It's possible that once you start replying to reviews it will become never ending. Your customers might come to expect replies and use it for questions etc. They will expect instant answers Also what to do about the Troll reviews? I have one guy that has left the same one star review for at least the last 20 updates. I'll have to be very careful with my replies to such as him. Minefield
I don't think it is over just yet. I've been making apps since 1999 and last year was the best year that I have had despite the continual changes. But starting out afresh without a pot of cash wont be easy. Forget paid apps (see my post above LOL).