Wonder how much energy he had left after unloading like that? Probably just enough to slump in a seat and skin up a joint. Something we can conclude from watching this: what an amazing athlete he must have been in his physical prime if he can still explode into punches like that in his mid-50s. But beat Wilder, now? No.
He pretty much lost the capacity to do this after about 1989, either physically or because he wasn't training the way he used to. Probably a bit of both. Muscle memory allowed him to perform a facsimile of this style but the slight drop in speed and mobility killed his effectiveness at a very young age...