Another point the author misses is that most users - and for that matter developers - aren't chasing the latest features in Android. Look at Froyo for instance

Another point the author misses is that most users - and for that matter developers - aren't chasing the latest features in Android. Look at Froyo for instance - it's awesome, but I can guarantee you that right now, probably less than 1% of apps in the market actually use Froyo specific features. And as nailer points out, if you really must use them, then you can make sure no one with a phone earlier than that can even see your app in the market.