What's with the ARM JIT for PPSSPP Why Is It Terrible?

[[Unknown]]

I think you're working off old information. On most devices, including ARM devices, the slow part is your graphics driver and the graphics commands that are sent to it. Both jit compilation and execution, especially on modern ARM devices, are fairly fast. Of course, it depends on the game.

Of course, development of the x86 jit is easier when you're developing using an x86 machine.

As for iOS, that's so bad because there's very literally no one maintaining the code for it anymore. I do not even own a device that is capable of running even somewhat recent versions of iOS. Also, jit is automatically disabled when using PPSSPP on an iOS device that isn't jailbroken afaik, and I've heard that different jailbreaks can cause bugs, crashes, and possibly even poor performance. Really seems like a minefield I want to be absolutely nowhere near.

-[Unknown]