“Fragmentation” is a bogeyman, a red herring, a story you tell to frighten junior developers. Yawn.
Here, let me try: 53% of Android devices in the wild do not expose the multitouch API. I want to develop a photo viewing and manipulation application. A comic book reader let’s say! I can now choose between:
Making a product a minority of the install base can use
Making two different versions, with two different modes of scaling, rotating, etc that will both appear on the Android market (to 2.0+ users)
Saying “fuck it” and waiting until the scene “settles down.”
Especially now as Android tablets weasel their way into the market (more 1.x devices; yay!), the fewer problems I have to worry about on the software side the better. We’re not talking about screen sizes or pixel density; we’re talking about dealing with your beta-quality API almost two years later.