I was also confused about this. I didn’t find an article talking about yet either. My current assumption is that it is just this game and that it is still a closed pre-release. So they maybe just wanted to remove noise from people that don’t have the required specs during their testing phase. It’s also not a lock to a specific GPU vendor as I originally expected from the title.
Does GitHub support range requests for artifacts? With that you could read the file index without downloading and caching the entire zip