If you are using HEN (Hybrid Firmware) or an ODE (Optical Drive Emulator), the Folder format often requires you to mount a "disc" via multiMAN or webMAN MOD. This adds background processes that eat up RAM.
As it turns out, "wet" is a quirk of terminology, but the benefits associated with these files are very real.
A hybrid approach is best.
Give me the dripping, sizzling, slightly-mossy . It runs cooler, sounds friendlier, and confuses the motherboard into compliance.
If you want to take advantage of "Wet" style efficiency, you generally have two options: