You should know that the guy you cited in the second link, Srid, is a well-known right-wing shit-stirrer who is banned from basically all NixOS spaces because he cannot peacefully coexist. He literally gets up day after day with the seemingly sole purpose of fueling drama and causing problems. Don’t take his opinion at face value, he wants to see the project burn down and this colors his interpretation of events.
NixOS is going through a rocky moment for sure, but there’s no indication it will implode currently.