Yeah, there’s a real doughnut-hole in the '90s-2000s between when stuff was old enough to be remastered and stuff was new enough to be digital/HD to begin with. Also, I double-checked, and according to this article what I wrote before wasn’t entirely accurate: apparently the raw footage is on film, but the cut and edited product only exists on video. In theory, they could go back to the raw film and re-do the entire editing process, but it would be cost-prohibitive compared to how much consumer interest in an HD remaster they expect there to be.