It's my understanding that those are (mostly?) devices where they legitimately have reason to believe there are zero users. In particular, there's a pattern where someone will discover that Linux has a driver that hasn't actually worked for a long time, and nobody's complained, so then they remove it.
I'm not suggesting they keep it all... just ironic as a statement considering Linux is literally removing a bit lately... <= 486, the bus drivers for mice, etc.
I'm mostly okay cleaning out a lot of legacy and unsupported devices. In some ways, and for people who want to support really old hardware it may not be great, but they're most likely stuck on older versions for other reasons.