these guys can and do play with anything. i'd bet the switch took him all of an hour, maybe.
they could, but not to their max potential, its just not healthy...they ofcourse can bring it back
but lets be honest here, staying with one equipment and not fiddling/changing all the time is probably the right choice for the pro's, some snooker pro's stay with one shaft for their whole career and I kept hearing stories about Stephen hendry, and some other big names where they played flawless with their one shaft that they're used to their whole life and the moment it broke and they were forced to switch, their game was never the same. It's there on youtube somewhere you can find it.
I think same theory goes for pool also, to a certain extent. I believe if a player keeps fiddling/switching their equipment, in the long-run it isn't great for them. Just look at Styler, this kid keeps changing weights/shafts/butts like it's a candy flavors, and look where that got him...amirite