It's why old physical media ownership and ripping it, is so important for true preservation. Pirates are doing God's work here. You can't count on IP holders, bug movie studios and streaming services, both for availability and for accuracy.
All those remastering are often done with more importance given to the economic side of things, instead of respecting the art.
Some are destroying the original work.
The first thing that pop into my mind is how they destroyed Buffy with the HD makeover:
https://www.youtube.com/watch?v=oZWNGq70Oyo
As a reddit commenter said about the cropping job: "All they had to do was nothing and they still fucked it up."
It's a disgrace.
But "accuracy" is the wrong word I think, old home video transfers are not more representative of the original theatrical presentation just because they came out first
And yet, they do. They throw away detail as they please. That’s preservation?
Compression is needed on torrent sites because few peers are interesting in downloading and seeding a 60+GB raw file of a movie if the 12GB mkv looks just as good on the 1080p Wallmart monitor.
There are of course also RAW rips of blu-rays out there but mostly for AAA IPs like Star Wars, LotR, Matrix, etc, not for niche content that have a reduced audience.