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?

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.