There’s been a lot of innovation in putting technique (like AimPoint, plumb bob) and in putters with the latest trend being face balance + lie angle balanced putters. 40+ years ago most putters were essentially the same with some degree of “toe hang”. Toe hang is how many degrees down the toe of the putter point when you balance the putter on the shaft. 90° is the max and very old school - for decades this was the only option. Face balanced means there’s 0° and are very popular today.

However through all this innovation and advancements in technique, putting related outcomes have not improved. Players today are just as bad at putting as players 40 years ago, etc.

Putting is really hard and the best players on earth are only 50% from 8’ and it falls rapidly every foot thereafter. It’s a skill a dedicated amateur can get to a pro level reliably.