That's quite a statement, are you sure about that? The Graphene team has done a considerable amount of work sandboxing the environment of Google Play, both in memory, permission structure, and IO access that MicroG completely blows past. Given how the Graphene sandboxing works, I actually can't think of a scenario where the statement that MicroG is more private than Graphene sandboxed Google Play. In either scenario you don't have to log in, so I'd much rather have an environment that has been isolated than tooling that still has tendrils reaching into the main OS itself (MicroG).
Signal is not designed for anonymous communication. This is fine. Some of us like having a messaging platform that is E2EE because we don't have to trust the midpoints. I get to chat with my family in a convenient manner while not worrying about the telecom company doing things like logging SMS contents. Different tools for different jobs.
Note: Flork acknowledged the typo already.
This is what I ended up opting for and it works very well
I believe this guy was around 40oz
These are probably a bit more fiery due to the lighting
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IMO Graphene is the only true option in this list, with Copperhead being aggressively sus given the history
RIP OP