Advancements in remastering processes/technology

[Nick1985]

For me, one of the big improvements with 4K Blu-ray for catalogue titles isn't so much for he boost in resolution or HDR, it's the fact that the remastering process seems to have improved dramatically over the last few years.

Looking back to older Blu-ray catalogue titles it seems that the remasters were poorly done, where as recent "re-remasters" on Blu-ray and 4K Blu-ray knock spots off the originals.

So what's changed? Is it the quality of scanners, editing tools, possibly even AI?