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You also get the luxury of ignoring many of the native UI paradigms with games.

• eropple 15y ago
  That's true. I don't have to deal with native UI libraries. Instead, I also have to deal with disparate interfaces to graphics, audio, sound, the file system (if it's accessible at all), the content loading paradigm for the platform (relevant esp. for Windows Phone 7), timing differences between the platforms, and a number of other issues. I have to develop and code to lowest-common-denominator interfaces that contain a lot of hidden gotchas and limitations, and make the presented interface work identically on all platforms. I'd take re-coding my UI layer over having to write near-identical code for XNA and OpenGL, then writing near-identical code for OpenAL, XNA, and Core Audio, then writing widely divergent input code for XNA and whatever not-well-standardized gamepad layers I can repurpose or build for Linux and OS X and the different touch frameworks... Having to write all of this stuff is arguably on par, if not more complex and difficult, than reimplementing a UI layer. It's not a "luxury" at all.