#5 makes a lot of sense and is often overlooked. The argument often is that it is not the tools that determine the quality, of the app, but let's see: Adobe CS5 Flash2iPhone is developed without iPhone OS 4 in sight. The main target users
for it are those who are not familiar with iPhone OS and frameworks and would enjoy just pushing a button and letting the tool to do the rest. The timing is such, that a flood of apps developed this way would arrive just in time iPhone OS 4 comes out. End user does not know and does not care which tools the App was developed in. No surprise this does not look pretty in Apple's eyes.
I and cannot imagine Flash2iPhone style of app producing anything about mediocre. If it targets Android too — even more so. This way all you can get is unisex, unisize sportswear. Apple wants tailor suits and designer dresses.
What if my app doesn't need all the latest features? I don't see how this argument makes sense. After all, competing SDKs don't force their users to stick to them. If somebody has already written a couple of Flash apps for iPhone, but now wants to program a 3d shooter, nobody is stopping him from switching to Objective-C.
