Funny thing on this is I'm with you, although it had massive variety. The challenge was that when they came out, for many of us all we were interested in was playing footy games, shooting stuff in COD or racing around on GTA. They churned games out back then so quickly too, huge library of games to pick from. PES > FIFA in those years too! 😅
And I'd say the rule of thumb I tend to use is if they've stopped producing games for the console, it can be considered retro in my eyes 😎 The last game produced was back in 2019 for it....and don't include the digital gamepass games, my dude 😄