WTF man? A hard fork or 2 a year means updating the wallets and whatever systems merchants use two times a year. Do you have any idea how often windows / linux or whatever OS updates? As long as the economics of the coin remain unchanged and the security of the blockchain is maintained i say fork away!
If a coin becomes more than play-money, it'll do actual financial damage each time a hard fork is forced on it. There's a transient period where versions are inconsistent. The whole point of Scrypt-N is that it changes in time
without needing to hard fork.