Bib #1 wrote:
Much has been made of impact of shoe technology to running. Not to mention pacing lights and track surfaces (cinder vs whatever tracks are made of these days).
Better clubs and balls have changed golf
Rackets and balls have transformed tennis
Bats and balls and mitts have impacted baseball
Bikes are way better for cyclists these days
Football maybe less so, although today’s footballs probably spiral better and may be easier to catch and handle due to more frequent replacement, better materials and better overall construction quality. Receivers and QBs also use tacky gloves not previously available. Today’s pads and helmets are better, obviously, mitigating injuries
Basketball is probably least impacted of all
Discus
In team sports and all the ball sports, technological advances don't matter so much, since you're only competing against the other team, not all of history in your sport. Even records for things like HRs in baseball are subject to a million different variables that make comparison across eras difficult: stadium size, ball and batt construction, league size creating a dilution of pitcher quality, offensive and defensive strategic changes, etc.
Technological changes matter so much in a sport like running precisely because it is so simple, with so few variables. It's amazing to know that a runner in 2020 is competing on the same courses as runners 30, 50, even 100 years ago, so you can make direct comparisons across eras very easily.
But change one variable (for example, cinder tracks -> tartan tracks) and suddenly the whole sport changes.