And the lack of a transparent file system. I don't think they'd allow scripts that allow users to access the file system, so most file and directory related stuff would go out the window too.

I agree - it'd be way too different on iOS to be called mIRC, and would be a pointless endeavour.

Android is a hell of a lot more flexible and could incorporate a lot of the features that mIRC has, but mIRC has taken Khaled so many years to write... it just wouldn't be feasible for one person to develop both. Statistics indicate that many Android users are less willing to purchase apps too, sticking to free versions or pirating paid ones, so Khaled probably wouldn't see a very big return for the effort.