Fedora 40 firms up for release

Agreed: Red Hat isn't behind every choice. Now that Fedora is effectively further upstream, even less so.
Fedora has a thriving set of developers of its own.

One thing, however: as a relative outsider, my viewpoint is that no-one should _rely_ on Fedora to be stable. It is a cutting edge release for things to be tried. If you want to rely on it long term - say as the basis for Amazon Linux 2023 which seems to be put together from three Fedora releases and CentOS stream - you're doing it wrong, given that the lifecycle is 13 months.