It was one of the attack vectors for the PlayBook (Blackberry/QNS) but by that point they were too far behind.
Because the whole point was to use it on multiple platforms. Without iOS support it was just not worth it.
A few really big indie hits were however written in flash and related languages.
Android + Web + Desktop is not multiple platforms?
I don't know if this is still the case (haven't cared much about the mobile market for a few years), but what the Android and Web markets were missing that made iOS a necessary target was: users willing to pay money for apps. I don't recall the exact percentages, but many mobile app companies were reporting that iOS users made up 20% of their users and 80% of their revenue. Something like that.