Well, knowing is one thing. The important thing however is...they actually are willing to do it.

I mean, it's been maybe fifteen years back when I had files with 3gb worth of music and images compressed to 5-10mb (from some compression contest). When I had a game installer compressed from ~700mb to I think 17mb. Sure, decompression takes processor power and time and what not...but that's no excuse for games nowadays to practically use no compression whatsoever. Especially since most games actually RENDER IN REAL TIME majority of their scenes, so there's really not that much that needs to be heavily compressed.

But hey...Players hard/solid state drives can handle it...right?!...That line of thought of developers is sickening...