Passer rating gets more and more pointless every year.
You can see average passer rating by year here:
https://www.pro-football-reference.com/years/NFL/passing.htm
When Young played, it was in the mid-70s.
When Peyton played, it was in the low 80s.
Now it's in the low 90s.
At this point, it's getting compressed at the top end and the differences between most starters (top ones anyway) aren't very meaningful: so many guys throw fewer than 10 INT, for instance, that 1 or 2 more or fewer (basically in the noise) can change the order substantially.