I think where valve went wrong was not requiring specific minimum specs. It led to a very inconsistent and hard to support platform.
Steam deck leading to a standard “steam device” hardware platform with consistent OS and hardware is my dream, but I know their goal thus far has been to refine steamos and release it for OEMs to use on their devices.
Satellite sos was only available on 14 or newer on release, which is even less support for the prior gen than apples intelligence features (which at least supports the pro lineup from the prior gen, as well as every apple silicon Mac released)