That video also teaches(for @legends_game) "ok materials can choose from hundreds of textures completely randomly" for entities(literal random player textures from an array of hundreds in legends is so simple) without any issue whatsoever as variations and it's really easy to do
Unpopular opinion/"hot take": If Mojang focused and just did an OreUI overhaul drop with no other new features that overhauled everything existing properly to OreUI that would be better than many other potential updates. (note: I don't think the tiny takeover update is the worst)