So what's your point? Because your answering your question yourself, for Marques his workflow the Mac Studio is faster than the max-specced Mac Pro. So he switched, because time = money.
You seem to be suggesting that Marques shouldn't have switched, because for other people their workflow it may not be faster...
That he's a full of it frisbee player YouTube hustler thats telling a slanted story that benefits himself and skews the truth into oblivion. Nothing new for him, so yea, old news to many.