WRT pool there is another angle, too. I suppose we all agree that back in the old times there were a lot more pool players than nowadays. 5-fold, 10 times as many, 100x or even more? Whatever. How likely is it that from a pool (pun intended) of 5 times or more as many than nowadays there will be less skilled players at the top?
If you don't believe it - why would a German football (US football) team not stand a chance against any US college team? Why do tiny countries (even if they are rich enough for all the most modern sports equipment and medical attention) not show up significantly in Olympic medal statistics? And why do some relatively small countries make an impact in some athletic competitions which can be considered a national past-time?
Yep, the answer is always: If there is a larger base of people seriously committing to some activity, they are highly likely to have many record holders, medalists etc.
The same concept can be applied to pool over time. It is not an intelligent assumption that the top players from yesteryear were in any way worse than today's players.
If you could make them compete directly a fair competition would involve both sets of players either play 50/50 on old and new equipment or on totally new equipment which neither group ever played on. Something like Russian pyramid tables![]()
In pool the best example is the Philippine players. There are many more pool players in the USA then in the Philippines, maybe ten to twenty times as many or more. And I'm talking about players who take the game seriously and practice religiously. Yet the Philippines turns out many more quality players than here in the USA. Why? I think the answer lies in motivational factors as well as economic ones. Also being a pool player in the Philippines has no negative stigma to it. Remember Efren is an icon there.
There is probably more to this equation than I'm stating here. Even a country like China with tens of millions of pool players are barely a match for the Philippines. With all their advanced training methods and discipline I'm not sure a team of Chinese players would be favored over a team of Filipinos. It would be close for sure.