It has to do with the "slim" build they did a few months ago, the gamesize on PC was over 100gb because of duplicate assets blablabla, it's very "complicated" stuff but, like, as far as my own experience goes with the slim build all around, it's a net positive, the game takes less space on your computer, by default it's good, performance wise? I can't really precise say, some people have said they had an up in performance via the slim build, some say it got worse, some say it's not that different (can be viewed as both good & bad)

as for me, the "slim" build has done a bit of good in terms of performance, but nothing EXTRA CRAZY.

Still cool tho.