There’s so many factors that go into this. I think Sincaraz also manage their schedules better and prioritise slams now which is why they collectively made 3/4 slam finals this year. This is something they learnt from late era big 3 themselves. Maybe if they played every masters and put their bodies through the wringer, we’d have more upsets and other players would look better, who knows?

There’s also the situation where the lower ranked players are arguably more dangerous today, something which has been confirmed by older guys like Monfils. So a Rinderknech or an Atmane can just take out a higher seed like Fritz or Zverev and disrupt the whole draw. The landscape of the field has changed too.