This is a compromise. Later APIs have more features that make your life or application easier.
However, since many devices cannot run later APIs, your target market is smaller.
You must choose an API that will return a large profit. That balancing with earlier APIs can make the development process more complex, longer, and more costly, even if they have more devices.
Similarly, I actually developed software for certain screen sizes, since there is no way for my application to look good on the phone, so there is no point in trying me. I preferred a possible market space to (1) make it look good on tablets; and (2) speed up development time.
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