That wouldn't surprise me. Combat sports have had a lot more attention on a technical level since then. Rather than just heavyweight super fights attracting the casuals like the 20s to the 90s.. mma cards in particular are watched from top to bottom from millions of people.. some promotions even report billions of viewers.
No doubt this higher attention to detail has led to better fighters. But in boxing its another story. Anyone could actually be the best we don't know for sure. Jake Paul could possibly beat Canelo but we will never know because as soon as Canelo sees him as a threat then Canelo would just hide from that fight. We saw him get pieced up by a guy that only 100 people even bothered to watch the fight because it was supposed to be a walk in the park but clearly Canelo isn't really that good (lost to smaller fighters in ggg and Floyd as well) and we all saw that grandpa from the crowd beat up rolly until Tony weeks had to jump in and cancel the fight so rolly didn't lose