Modern boxing favors runners
Modern boxing now allows you to hold even though its illegal. But its only allowed if you are holding to stall the fight. This enforcement makes fights more boring. Because some fighters will run from their opponent and hit while moving and when the opponent finally corners them to hit them the runner grabs him and holds on allowing the ref to break them so the runner gets space to keep running.
Old school boxing allows you to hold and hit. So this made it harder to just run the whole fight and use the rule set to avoid fighting. Because your opponent can grab you with one arm and hit you with the other. Also you should be allowed to hit someone from behind as long as the punches land to the side of the head and not the back. This not being allowed also benefits thr running type. Because they will angle themselves sideways and bent over at the waist. But realistically you could just step behind them and hit them. But they dont allow this. Id love to have the old ruleset back in boxing with the modern skills.