Interesting. I had a poke at postmarket, which wasn't ready in comparison with SFOS. Would you say the FLX1 is at better stage in development than postmarket?
You're comparing a Linux OS (postmarketOS) to a device (FLX1). I think you meant to compare postmarketOS to FuriOS : )
FuriOS (and its base Droidian) are at a better stage of development for devices made to run Android using the old Android Linux kernel, whereas postmarketOS is better for devices made specifically for Linux, like the Liberty Phone, Pinephone, etc. Droidian will not even work on them.
I'm not familiar with postmarket, but I imagine it shares a lot of the same phosh+GNOME app ecosystem, in which case, the apps aren't in a better state.
In terms of polish and app/dev ecosystem, I feel SailfishOS still rules, but it's getting harder to justify using/development, with it's increasing divergence from upstream.
