Ben Lachman has some good suggestions after my post and David Smith’s on what to do with abandoned apps, saying that apps should be more clearly labelled as “abandoned”. Which device you’re using could also have an impact on search results:
“Search results could be weighted by the device you are using quite heavily. Just like how on iPhone you don’t see iPad-only apps when searching the app store; on iPhone 5 you should be very unlikely to see apps that only support 3.5-inch screens.”
Makes sense to me. Also check out his comment at the end, that kids these days may have a very difficult time revisiting the classic apps from today, 20 years from now.