But I agree with you.. they're generally better about hardware support than software.
The "Nest" rebrand of the Google Home devices to me signifies that they're really investing in this consumer IoT product line. That and they're (arguably) the dominant player in the space.
Well, sure. Look at the Pixel phones: the Pixel 1 was released Oct 2016 and support ended Dec 2019, and the Pixel 2 was released Oct 2017 and they'll be dropping support this year after updating to Android 11.
Even with Nest specifically they dropped Works With Nest support last year, effectively killing off the many integrations that had been built since 2014 in favor of their newer Works with Google Assistant program.