@DarkMahesvara I do not really see a point to this. At best companies will have to very explicitly state "THE SERVERS WILL BE SHUT DOWN WHENEVER WE WANT" and people will click OK and buy it regardless as they already do
Just do not buy always-online games
ofc the best case but also most unrealistic would be to force them to patch the games at end of support to allow offline play or release server side software to self host but we not gonna get there without trying.