Much as I’d like to see Xcode on iPad, I doubt it will happen; at least, not with the current Xcode.

Xcode is huge, it’s bigger than most games. A lot of that size, is an aggregation of tools, built up over a couple of decades.

Replacing it with a rewrite, would be a major operation, but would probably be required, in order to work on iPad.

Most of its size, I think, comes from the device emulator images.