I feel I've arrived somewhat late to the discussion, but I think it would be reasonable to weigh in here, because I'm home-assistant's (and coincidentally wled's) primary maintainer on nixpkgs these days.
The community consensus seems to be that we really want to keep these packages around, as dropping some of them will unnecessarily break user experiences, which I hope is also not in your interest. I'll also hope we can get to a cordial outcome despite our differences of opinion.
It is true that a lot of components to this day remain unsupported due to missing packages. This is due to the immense number of dependencies home-assistant relies on - but we are certainly catching up.
We also run a significant number of tests for the components where we have all dependencies packaged up. We invest a reasonable amount of time to debug failing tests and make sure things work within our environment.
We have rarely asked upstream for support, knowing full well that NixOS is a special snowflake with regard to how everything gets composed. But please recognize that this is the place where we collaborate to bring home-assistant together with our philosophy on how system administration should work.
We take great care when updating home-assistant and its leaf packages, and the index you found is created by tooling that also compares versions of packaged and expected dependencies, so it is somewhat unlikely that we'll ship home-assistant with an outdated dependency.
I also firmly believe that our community is well aware of how we compose home-assistant, so that it runs on NixOS, that they also will be highly aware when breaking changes occur, that they might be our fault.
I'd be happy to more clearly make our users aware, that our distribution is not supported upstream and that issues should first and foremost be directed to us, if that unburdens your project. It was certainly not our intention to sour the relationship with our upstreams.
I hope that puts all technical misunderstandings to rest and we can move on.
Martin Weinelt