Not really disagreeing with you per se but noting it is a bit more involved than that.
QB rating has largely changed due to rule changes. It's not a straight line adjustment of X years equals X points.
As passing has become more prevalent and necessary the ratings have gone up.
As to Winston well the QB rating is a bit of a wildcard stats that ignores a lot of negative plays like Winston's fumbles and charges him only a small negative for an INT that ends up a pick 6.
That's really more an issue with the scoring than it is an era discussion.
And again lots of sources have different scores.
Probably one I most trust copies pro football reference.
https://www.footballdb.com/leaders/career-passing-rating
It places Dak tied for 5th all-time.
And no I do not think Dak is the 5th best of all-time.
But it has him significantly ahead of his peers as well as just historic QBs.
And Aikman was far better on the field than his QB rating suggests. --probably why he created his own rating system.
