My guess is the big video ram is high resolution textures, complex geometry, and a long draw distance. I honestly don't know much about video games though.
The smaller install is totally the map streaming stuff. I'm unsure quite why it has to be so big, but again, I don't know video games. I do recall you having to tell it where you want to start from and it'll download some stuff there.
I think blind itself drives some interesting bias. The public posts are pretty incel. You need a critical mass of folks at your company to have a company private board so it attracts folks from bigger companies. It doesn't seem to represent average folks well. Unless I have no idea what average is.
I'm not sure what to do with that instinct. The overall results say a thing I wanted to hear. It all feels weird.