Is an Xbox worth a buy along with my PlayStation?

Answer 1

maybe get a xbox one s.  if you just want the exclusives, and have a ps5 already, you may not need a xbox series x.  or if you're all digital, get a xbox one s digital or xbox series s.

Answer 2

Not really, no. Aside from a few flagship titles, most games release on both platforms, so you dont need both to ensure that you can access all your favourite title. Pick the console you like and go with it.