Arch is aimed at people who know their shit so they can build their own distro based on how they imagine their distro to be. It is not a good distro for beginners and non power users, no matter how often you try to make your own repository, and how many GUI installers you make for it. There's a good reason why there is no GUI installer in arch (aside from being able to load it into ram). That being that to use Arch, you need to have a basic understanding of the terminal. It is in no way hard to boot arch and type in archinstall. However, if you don't even know how to do that, your experience in whatever distro, no matter how arch based it is or not, will only last until you have a dependency error or some utter and total Arch bullshit® happens on your system and you have to run to the forums because you don't understand how a wiki works.
You want a bleeding edge distro? Use goddamn Opensuse Tumbleweed for all I care, it is on par with arch, and it has none of the arch stuff.
You have this one package that is only available on arch repos? Use goddamn flatpak and stop crying about flatpak being bloated, you probably don't even know what bloat means if you can't set up arch. And no, it dosent run worse. Those 0,0001 seconds don't matter.
You really want arch so you can be cool? Read the goddamn 50 page install guide and set it up, then we'll talk about those arch forks.
(Also, most arch forks that don't use arch repos break the aur, so you don't even have the one thing you want from arch)
It's the best beginner distro for those beginners who want to learn about linux.
Just like the ocean is the best body of water for children who want to learn about swimming
I agree, there's a lot of people in this thread who seem to know exactly what is good or bad for a new user. But I don't see many being sensitive to what the user might actually want to achieve. New users are not a homogeneous group.
If the user wants to both use (stably) and learn (break stuff) simultaneously, I'd suggest that they start on debian but have a second disk for a dual boot / experimentation. I don't really use qemu much but maybe that's a good alternative these days. But within that I'd say set them self the challenge of getting a working arch install from scrath - following the wiki. Not from the script or endeavourOS - I think those are for 4th/5th install arch users.
I find it hard to believe that I'd have learned as much if ubuntu was available when I started. But I did dual boot various things with DOS / windows for years - which gave something stable, plus more of a sandbox.
I think the only universal recommedation for. any user, any distro, is "figure ourt a decent backup policy, then try to stick to it". If that means buy a cheap used backup pc, or raspberry pi and set it up for any tasks you depend on, then do that. and I'd probably pick debian on that system.