Ah yes, I didn’t think about the Disney films. Indeed, OBWAT is not the first DI.
There was also the Gone With the Wind restoration from the early 90s. That was completely digitized.
OBWAT is the first complete DI of a live action movie.
As for the ‘98 theatrical re-release of GWTW, only 12 minutes or so of the movie was digitally restored, according to this article: