another thing that has contributed to a lot of this is the equipment. companies that didn't understand why certain equipment was made, businessmen coming in and "streamlining" and sending manufacturing overseas.
Almost no one uses bag mitts anymore, which are vital in teaching you how to punch at all extensions. I really haven't seen a good short Joe Louis type puncher on the inside. Almost everyone uses those puffed up 16 oz foam gloves and slaps the bag. Also, catching punches has become pretty tough with gloves that are pre-curved and don't allow for the opening of the hand. Most everyone just ear muffs for defense.
boxing has most definitely regressed. the nutrition may have gotten better (watch this vid if you think athletes have truly evolved somehow ), but the talent pool has deteriorated significantly. I'm a big believer that the top talent today could definitely compete with the top from before, but they would not dominate like they did with long unbeaten streaks.
with more care and attention to brain damage, talent has gone to other sports. not saying that boxing was ever a huge friendly community, but it seems like talent has become very siloed. too much talent is tested too late in the game, too many are concerned with the zero, hitting mitts, and social media.
Trust me, I'm not one of those that can sit through every Ali fight and ooh and aah. but I can't really watch boxing today unless i know the fighter, or the stakes are truly high. Fury Wilder 1 was great to watch because of the anticipation and the clash of two heavyweight kings, but the second fight was a sober reminder of the staggering limitations of Wilder.
I have been pretty impressed with Canelo's development, but he would have become an even better fighter had there been more talent around. Aside from Floyd and his two with GGG, (might be shooting myself in the foot here) I can't really name another memorable Canelo fight. Lomachenko and Crawford could have competed in any era. When you're playing this game, you can't just bring back fighters from the past with today's nutrition, you have to give today's fighters the benefit that the old timers had, which is more knowledge and better sparring partners.
One of my favorites is what Don Turner said:
Basically that Holyfield could have competed in any era because he had balls. May seem crass, but there's a lot of truth and knowledge there.