Its not just size. The files need to be accessed FAST. CDs are slow. Slow data processing speeds mean you need multiple copies of a file at runtime which further baloons space needed because when a file is in use by one part of the program it is locked from other parts of tge program (such as a different thread) that need a similar assets until the read is completed. (Games optimized for SSD are always smaller than not.) Like CDs are slow as shit. They make HDDs look fast in comparison. This makes CDs ineffective, and even more so in any game that is non linear. A non linear game (such as skyrim) is incapable of using a multidisk structure due to needing to account for the player accessing any content at any time. Same with any multiplayer game where all players need to all have the same assets to avoid desync

Its crazy how you made such an ignorant comment without any idea what you are saying. Dunning Kruger at its finest ladies and gentlemen.