This is the real reason why Apple doesn’t care about upgrade pricing: there’s no demand from customers. The market has shown that free apps will be downloaded at least an order of magnitude more than paid-up-front apps, and smart use of in-app purchase in a free app is likely to make more money. Over time, this trend has only become stronger and more clear.
Paid-up-front iOS apps had a great run, but it’s over. Time to make other plans.
Looks like it’s not the best time for me to get into the app development game.