Series S is fine, it's dynamic 1440p like dynamic 4k on the Series X and quite solid framerate with VRR support.
If the Series X is the best version at 1080p for 120fps then they probably didn't want the drop in image quality even further to get 120fps on Series S.
It is indeed fine.
Some people still can't accept that Series S is here to stay for the entire generation.
Dynamic 1440p60 - "WTF, wHy NoT 120 FPS"
1080p60 - "where is my 1440p60 as advertised"
1080p30 - "see, I told you it was a pathetic console"
Somehow I don't see the same arguments about mediocre performance modes in games like Dying Light 2 or Guardians of The Galaxy on XSX/PS5. Then it's always lazy devs, incompetence, shoddy engine or not enough resources put into it.
Honestly I'm not surprised that Series S is currently getting the short end of the stick. When you have to optimise for Xbox One, One S, One X, PS4, PS4 Pro, XSX, PS5, fuckton of PC configurations, sometimes even Switch or cloud versions, XSS is definitely not a priority. Far from it.
In a near, current-gen only future though? I can see devs putting much more care into that version of their games. That obviously doesn't mean Series S will magically deliver 1440p with up to 120 FPS in most titles, but dynamic 1080p60 or 30 FPS? Absolutely, and Series S owners won't mind.
Someone might say that's not next-gen enough. Well, neither is XSX/PS5 with their limited RT, non native 4K and some settings lower than PC's low. Who cares. All of these machines are still incredible for their respective price.
Fuck me, those console wars are getting tiresome.