Shocking lack of optimization and compression. Modern devs just don't care, they are using strong hardware as a crutch and their games just keep getting bigger and bigger (in size) and less and less optimized.

"B-But, the dialogue!" - there tons of games with tons of voiced dialogue. It can be compressed and it doesn't take up that much space.
"B-But my 8K textures" - useless waste of space. You can barely tell the difference between 2K and 4K anyway. How about shipping ultra-high textures as a separate D/L/mod/pack?
This just limits the games reach.