How do you decide which piece of fruit you want for lunch? Don't you have to compare different things? Aren't you always, in effect, comparing apples to oranges?
A "what if" kind of thinking, in many social circles isn't entertained seriously.
I lived that era and I can tell you from being there, you've missed out on plenty. And there's no way you can get it unless you lived it.
"Time machine?"
Start with the earnings. Players back then couldn't afford individual trainers for selected strokes like they do today. They have different people for everything, including specialists just to analyze and improve footwork.
Equipment didn't have the engineering today's rackets have. That offered limitations which was no fault of any player, you had equipment which was available and that's it.
Conditioning today is a good part of the game and obviously, ground exchanges are longer because of the "baseline" style of play.
Sure, it would be interesting for today's ATP or WTA players to use the rackets from the 60's or 70's. Same with the players of the past to play baseline tennis, but they aren't young any longer and cannot move as well. They do use equipment that is available today.
Who is using wood?
You also have to factor in the science. Yea, there's science taking place during the hitting process on all variations of stroke production and shot making. The science hasn't changed.
Today's tennis is filled with overzealous everything. I have difficulty with commentators who are bias and sometimes it's obvious.
And they know so little and won't stop talking. Tennis is getting like wrestling.
I don't enjoy viewing it like I did years ago.
Many of you have missed a great deal.
J