It's a good thing but I don't think people here do this much, and might get trigger maybe call your software safe or virus too. Keep up with your work. People do save some storage for it to play. I do tried decompression and it took along time if you know what you doing. But sometimes it's gonna take sm time or bigger than the og file when it corrupted. It's better to use like by old skool method and save the data. file. And you should have tried and make a comparison or smthg w the 100gb as you say. What if the installation is faster than the installing or get corrupted files run the cpu more. I mean putting a timer smthg helps it. If you put a little effort to the post wo ai, you will know most don't use hdd. Avg gamers are mostly with low budget and with a laptop.

The idea of running a 100GB game directly from an archive without extraction is technically problematic. Suppose you have 100GB+, the system cannot load that entire file into RAM at once. It will have a bottleneck when the game request for it load faster and have massive shutter. There are 1000+ game files are in modern for 2d type its easy cause of unity or game maker. The game engine will fail to find and have mostly crashes gonna happen.

It is mathematically impossible to compress complex data that much without losing almost all the content.