This is mostly so they can auto close support threads from "can't get Autocad to run on it" to "system rebooted in the middle of a work presentation and I got fired, I demand compensation"

You mean an L-take? I'm not sure why. SteamOS is a gaming oriented os, with specific user interface and update cycles and features towards that. I think its the right call by Valve to put this note that this is not a general purpose desktop os meant to replace it. I know about the desktop mode (have Steam Deck myself).

The point is, the goal and usage is not meant and to be considered a full replacement for a desktop. People can decide themselves to do it anyway, its just not the goal. So totally not an L take here. Unless I misunderstood your point.

The update is that you can officially download and install SteamOS on other devices.

Does this mean I can install SteamOS on any device?
 We expect most SteamOS users to get SteamOS preinstalled on a Steam Deck or device that incorporates SteamOS. The only devices officially supported on SteamOS right now are Steam Deck and Legion Go S.

We are working on broadening support, and with the recent updates to Steam and SteamOS, compatibility with other AMD powered PC handhelds has been improved. If you are interested in trying out SteamOS on your device and providing feedback, you can use the SteamOS Recovery Image and follow the instructions here.

Um... It's the article posted.