It depends on the publisher. For third parties they absolutely should support the old gen for at least a year. There are a ton of people who wait to upgrade. It makes no sense not to keep giving them new games.
For first parties it depends. M$ owes Xbox One owners for the poor support they gave the console during it's run, and the XboX only launched a couple of years ago. Their users deserve more than they've gotten so far.
Sony on the other hand supported the PS4 extremely well, and are giving it a great swan song with TLOU2 and Ghost of Sushima. As far as I'm concerned they can do whatever they want. PS4 owners should be happy with what theyve got, and have something to look forward to when they do upgrade.








