I suspect there are cybersecurity stakes regarding win11 and win10, but I am not entirely sure.

I think that the spectre mitigation are not a problem in win11 because win11 is not supported on CPU that are vulnerable, which might be a reason they encourage people to get win11 and get a new PC, but that's an unverified guess, I am just trying to get them the benefit of the doubt.

SteamOS looks like it might take a lot of the windows cake, but it remains to be seen if they will be able to.

So far it doesn't look like SteamOS supports most of PC hardware out there, but it could be a next step for Valve.