Is there any point in writing pre-Mango (7.0) Windows Phone 7 applications

Question

Inspired by an exchange on a recent question, I wanted to know whether there is any good reason to develop Windows Phone 7 applications that target pre-Mango models, i.e. by

Answer 1

I know from the analytics of my apps that there are still people out there using pre-Mango versions of Windows Phone, but as you point out, they are unlikely to be connecting their phone to their PC to perform updates or even update apps they've already downloaded (my wife for example would still be on the original shipped version if I hadn't updated her phone myself!).

With that in mind, personally, I don't see the point in creating applications now that target pre-Mango versions of the operating system. The return is highly unlikely to warrant the effort.