The reason they have to use CGI de aging still is that deep fake technology is not high resolution enough yet for movies, even if they look good on youtube.

The new Indiana Jones movie is supposed to use a special kind of deaging that actually is a mix of A.I. deepfake and CGI using a lot of archive footage of Harrison Ford. It'll be interesting to see how that plays out. I can see where it would work well on actors who have been in a lot of movies in their lifetime, so Tom Cruise would definitely be able to take advantage.

That being said, Michael Mann typically keeps everything in camera, but who knows maybe he'll be open minded like Martin Scorsese and try some deaging if he decided to do a prequel to Collateral.