By the time the 3DS and Wii U rolled around, games simply ran off the SD/HDD, with no fridge to clean, and no content needed to be copied to the internal storage.You're not reading the OP.
The fridge cleaning... means you need to transfer things from the SD card to the internal memory to play them. I can't just load up a game from the SD card and get to playing there is a useless step in between. That is the issue.
Even the "Extra Data" stuff was also saved on the SD/HDD. It was even possible to off-load almost all applications to your SD/HDD (except system vital apps) and just have it run from there.