I remember reading them back in the early 90s (Robin Hood: Prince of Thieves, Far and Away, Back to the Future). They don’t seem to be a thing anymore (or am I just not noticing them).
As an aside I remember liking them but I was a preteen at the time so maybe they were terrible and I just liked the movies.
I remember noticing a few of those when I was a kid. I think most of the Disney movies that were based on fairy tales then got a novelisation a lot longer than the original story.