Oculus system definitively needs some tool for Disk Defragmentation, because after installing few apps the performance drops heavily, and that even causes controllers to get randomly disconnected, drift and get dislocated and after installing too many apps the games become unplayable :/ Many people are complaining about disconnecting/drifting controllers, they are trying repairing, changing batteries etc and that is actually caused by installing too many apps and lack of disk defragmentation in system.
Michael Perfeito commented
Hi, I don't work for Oculus but I do work in the tech industry and I can say for sure that disk defragmentation would do nothing.
It's called "disk defragmentation" because it's meant to be used on old disk based hard drives. When data would get too spread around in the disk, it would get slower because the disk would have to physically spin around to grab the data it needed. The Quest and most modern devices use flash storage that has no moving parts and thus do not require defragmentation.
If you're having issues with it slowing down as you install more games, it is likely a bug.