Ironically a Linux-derived OS.
Nothing ironic about it. There's nothing mystical about Linux, it's just a kernel. The guy who made it says he doesn't care about anything but code.
Personally, I only care about the code. When I say maybe there are people who worry about walled gardens and cloud providers who take ownership of your data, I am not one of those people. That's not what I actually care about. That's not what I do. What I do is code. What I care about is code.
If you trust the client that is encrypting and uploading the file - which runs on your computer and thus can be audited, modified, or even entirely replaced by you. You do not need to trust that the server (which ideally is also free software, but in practice is a black box you don't have any visibility into) is sending you trustworthy code.
I don't know if grouping disparate projects under the "community" label has any worthwhile benefit. Given the label is meant to classify related operating systems, the label should provide an accurate description of the basis of the system. A simpler solution would be to just say GNU/Linux is a subcategory of Linux (and maybe even sub-sub-categorize by package manager or init system or whatever makes the most sense). Similarly, I think Android and its derivatives are worthy of being its own classification of Linux operating system (as long as you don't try to claim "it's not real Linux" or whatever).
With regards to software compatibility, I think it's rather the other way around - software written for "Linux" usually works on any POSIX operating system, and sometimes even Windows. Unless you're talking about binary compatibility, which is meaningless in the Linux space anyway.
Why not also recognize systemd, or musl, or kde or gnome or any of the other millions of non GNU packages that are needed to make up a complete OS.
Unironically there might be some value in recognizing "systemd/Linux" as a subfamily of Linux operating systems.
And these days GNU makes up less and less of the core packages that most distros run anymore.
Linux makes up exactly one package on a so-called Linux system.
Not at all, really. Forking is fine and building a business off of it is fine (I don't personally see the value in it but apparently Y Combinator saw fit to invest in this so what do I know). Where they fucked up was replacing the existing free software license with some "AI" generated mumbo jumbo, because they were "too busy building" to "bother with legal."
You didn't have to "bother" with creating a license, because there already was one. No one in free software should be rolling their own custom license (GPT generation aside) because there exist perfectly good ones already.
I'll be "that guy":
F-Droid is a software repository, not an app store. The distinction is subtle but important. A software repository offers a community-curated collection of software packages whereas an app store is just a marketplace for software developers to offer products to end-users. A software repository serves the interests of its community first, whereas an app store is merely a means for developers to sell products to end-users.
There are those who believe that F-Droid's role as a "middle man" vetting and building packages from source instead of blindly shipping builds provided by upstream makes it a security risk, because you're trusting F-Droid in addition to (some say instead of) the upstream developer. Perhaps telling is that none of these critics can offer an alternative solution.
Before anyone mentions Obtainium and Accrescent, these are not alternatives to F-Droid, they solve completely different problems.
Apple intentionally makes iPhone-Android interoperability crap in order to sell iPhones. That's not conspiracy theorizing, Tim Apple blatantly admitted to it.
https://www.theverge.com/2022/9/7/23342243/tim-cook-apple-rcs-imessage-android-iphone-compatibility
This is why the marketing around flatpak bothers me. It's touted as some kind of "universal Linux package manager" but Linux is just a kernel - all the stuff that apps depend on comes with the distro. So, in order for flatpaks to be "distro independent" they basically have to supply all the stuff that normally comes from the distro - effectively building a second distro on top of your existing one.
Nix and Guix are the same but at least I think they're more up front that they are effectively distros that can run on top of your existing distro or as a standalone operating system directly on top of Linux.
FUTO changing the definition of open source to suit their business model is like that time US Congress decided that pizza was a vegetable because it has tomato sauce.
FUTO's EULA may superficially resemble a true free software license (and may be good enough for you, personally) but it fundamentally undermines core tenets of the free software movement in order to preserve their business interests. All pseudo-FOSS licenses (whether of the "ethical" or the "business" variety) do this, because they prioritize the interests of the rightsholder above those of the community and the user. If important free software projects like Linux and Firefox were released under this license the free software world as we know it would not be possible.
As proprietary licenses go, it's certainly far from the worst.
Free software is a matter of liberty, not price. It is perfectly legal and ethical to sell free software. Keep in mind if you're using third party code (whether it's libraries or external contributions to your application) you must abide by the terms of whatever license it is under, this is whether it's paid or gratis.
It's even perfectly legal to fork an existing free software project and sell it on the play store, although whether that is ethical or not is up for debate - depending on what efforts you put into your fork before selling it, an orthodox Stallmanist might have no problem with it but the original developer(s) of that code may perceive this as "theft." Keep in mind you must abide by the terms of whatever license the project is under, so if it is a copyleft license like the GNU GPL you must either provide corresponding source code or an offer for such.
I have never used /e/ but I do not have a positive impression of it. From what I can tell it's just LineageOS but with microG (with Google registration turned on by default) and some "app store" thing (which tells you what proprietary applications are "good"), tied to their cloud (it's okay because it's not Google you see) and with a proprietary map app with a "good privacy policy."
Privacy policies are not a substitute for free software licenses and any organization suggesting they are is not reputable in my opinion.