For a fraction of the cost, Netflix could have instead just frame remastered the original show into 16:9 (not lazy cropping) and spent most of the effort into marketing it properly to gain a much wider audience.
But that would involve talent, critical thinking, and accepting that animation is a format not a genre. So naturally they just bought the rights so they could have their version of Star Wars/Harry Potter.
I could go on an entire rant about how even thinking making an animated show into a live action is a stupid idea, no matter how much money you throw at it, but I think I'll just wait for E;R's 2 hour youtube special instead lmao.
The best visual artists are extremely effective in their use of space. A 4:3 image expanded to 16:9 would just look weird, as the framing would simply not look right.
The alternative is some amount of expansion and cropping but it would still not look nearly as good as leaving the artwork in it's original aspect ratio.
A great example is Seinfeld which looks frickin terrible in 16:9:
I only know South Park, but from what I remember most of the shots there weren't particularly cinematic, most of it was pretty "matter of fact" with the main action/focus to the middle of the characters with everything else around just being eye-candy non-important filler. I could imagine it then working much better.
That's why you have it done by an actual animation studio with actual artists who can redo the composition if necessary. Way easier to do with animation than with anything else, technically speaking, e.g. you can crop out characters, reconstruct the matte and move the characters elsewhere without having to account for fancy realistic lighting.
The alternative is to be Babylon 5 which was shot on 16:9, framed for 16:9 but making sure a 4:3 crop doesn't cut away important bits, in anticipation of the new format, alas the CGI was done in 4:3 and quite low res and noone has ever bothered to prepare a proper 16:9 release (and with the remake on the horizon that ever happening becomes more and more unlikely). There's a version out there in acceptable 16:9, though: Most of the footage doesn't include CGI and so is fine as-is, arguably better than the 4:3 crop, and the panned/zoomed CGI parts aren't too jarring. Definitely blurry, though. I'd actually recommend it over the original release, imperfect as it is.
I'll just wait for E;R's 2 hour youtube special instead
Didn't that guy get revealed to be a nazi sympathizer straight up neo nazi that peppers propaganda into his videos """as a joke""" and got pewdiepie in a lot of shit for shouting him out?
edit: yeah I just went back and watched a reupload of one of the videos (the SU fusion video) that I actually enjoyed before I really understood what fascist propaganda looked like or how to consume media critically and... wow. Even "censored" to get past youtube's filters, it's much worse than I remembered.