For a device with a 10 year life, and enough connectivity to be future-proof, Google has handled them poorly.

It's only a few weeks ago that they added support for them in the Home app.

I believe they have a 802.15.4 radio, maybe the x chipset is too old, but it would have been great to get Matter over Thread support for them.

New-comers like Aqara will instead take up that space.