[dan-0]

Exactly this. Even if your demographic is the same as the chart, dropping 2% of users can be the difference between profit and destruction. Maybe it's margins that you'll save but keeping those users, possibly bad reviews, maybe market share over a competitor, there's plenty of reasons supporting older versions is not a definitive "waste."

Is it a pain to support old SDKs? Yep. But that doesn't make it inherently a waste of time to do so.

[Sammi]

You have to weigh in the quality improvement of the app that you can provide by not limiting yourself to old apis, and also the resources that you can spend on improvement now that you aren't spending as much effort doing support for old versions.