It’s the integration with those platform-specific requirements which I find so tough. Apple wants a particular format, signed and whatnot via xcodebuild. Windows, I don’t even know. Something about universal apps on the Windows store. Android is a bit simpler if you can target the right directory with the right toolchain.

It’s these particular systems that I find the most difficult. If there were a collection of nice utilities for working with them uniformly, oh, that would be amazing.