Don't you know that Ruth and company were the greatest and strongest power hitters of all time? Don't you know that it is not posssble for someone today to hit that ball as far as Ruth? That is sheer blasphemy!That means that 380 foot homer was aided by 41 feet because of the ball. That means that sluggers today on their own are only capable of getting to about the middle of the outfield on most of their drives. A 400 foot shot was aided by about 45 feet because of the ball then, meaning using a different ball it would have only traveled 355 feet! So somehow modern players have gotten weaker when it comes to hitting the ball then players 85 years ago.
The problem with this is we don't kow how a ball deteriorates over time. A baseball is made of organic materials that absolutely change over a time. Would a ball of say 1950 have the same springiness as it did back then? Your idea of testing old balls year after years is a great idea. It would show how a ball deteriorates over time.I haven't seen the study so I have no real way of rebutting it. But most of the studies are severely flawed in that they generally measure and "old" ball vs. a new ball and yes of course the newer ball travels further. What I would like to see is a university like Penn to do a 10 year study in which they measure the characteristics of the ball of say 2007 in 2007. Then do the same thing in 2008, measure the 2008 ball, then in 2009 measure the 2009 ball, so on and so on, until you get 10 years worth a data or 20 years of data or so on. Because as far as I know that is not what we are getting. We are getting people in 2000 measuring balls from 1990 or 1975 or 1995 or whatever and that has a bias in it for several reasons.