Idk, but not anything that uses delta compression like git does.
Game developers use Perforce and Plastic scm which is (supposedly) optimized for images and other binary assets. I’ve never used them, but I’m sure a less-overkill and open source alternative exists somewhere.
That's the thing, everything that I could find is a huge project made for storing huge projects, costs a lot of money and requires effort to install and even use. Yeah, naked git basically stores new version of an image for every commit, but nothing beats the fact that you need like two commands to use it and it just works, and storage is very cheap this days. And if you add LFS, it even does some kind of storage compression.
I'm not a programmer and I agree. Only after getting into 3d art I started hearing about it and I don't think I've ever used it, let alone understand it, it's the sort of thing the technical artists know about. Nobody ever suggested me to use it for my images or 3d models.
As a visual artist I can confirm the "image_final_final2_b_final" trope is as real as it gets