I think that when you look at it as speed-relative-to-players-of-that-era.....guys like Hornung would have succeeded now because he was faster than the competition back then
I mean, the Jet Sweep is kind of the spiritual successor to Lombardi's sweep. Sweep feel out of favor as the defenses adjusted, got faster, etc. Everyone is such an athlete now, it's hard to reliably pickup yards going wide.
Taylor was your between the tackles, 1000 yard rusher. As long as his speed, agility, etc, scales up with him hitting the weight room, more often, he'd fit right just fine in almost every offense since he retired up until now. He'd just be a HB.