There was a big todo back in the 1980s in response to classic black and white films being re-issued in colorized versions. Noted filmmakers and film critics came out against the process as a violation of artistic integrity, and there were even lawsuits over it.
Yet many people, having been raised on color films, preferred the colorized versions of older movies. And nowadays colorization is often applied to old documentary footage. In that case, the argument that colorization would violate artistic integrity is weaker.
The way A.I. is progressing, old films may eventually be re-issued with much more radical changes. Many young people find the pace of older movies to be slow, and one can easily imagine A.I. re-edits that impart a more modern pace to classic old movies.
Future generations might very well grow up seeing modernized versions of classic films. When that starts to happen, I wonder whether there will be an outcry from critics and filmmakers.