Very smooth way of using your torrenting skills on your CV.

That’s not what “remux” means. A remux is the original data from, for instance, a Blu-ray disc, transferred into a new container without re-encoding. What the author is referring to would be called a “hybrid remux”.

I'm grateful that diminishing returns were hit earlier with audio, though, which limits the blast radius for music releases. Most classic albums have a range of different masterings available on audio CD, many of which are available cheaply secondhand, which makes getting ahold of a good/accurate release considerably less daunting.

Movies and especially TV shows on the other hand are a mess. It shouldn't be a miracle to get a high-quality, faithful official remaster like the one Star Trek: TNG got.