Sure, but when you look at all of the elements that modern players today say that is the hardest to adjust to, it is not a new driver or new irons.... but rather a different ball.
The ball, ultimately, is the biggest difference. When Jim Furyk switched from Srixon to TaylorMade several years ago, his game tanked. The ball reacted completely differently and it took him 2-3 years to finally realize that TaylorMade simply wasn't the ball for him. He switched.
Same with Graeme McDowell, who switched from Callaway to Srixon. Graeme is still playing Srixon, but it's worth nothing that outside of the 2016 Mayakoba - he's not won diddly squat since changing.
There's a reason why these companies do all they can to lure in the big names as far as balls. More balls are bought than irons, drivers, or any other piece of equipment.
Truth be told, I'm very surprised that Tiger didn't at least entertain the ProV1 again. That said, his first tournament with the Bridgestone B330s was pretty good, all things considered.