Nasri's what age? 24? 25?
It's not unusual that players only begin to hit their stride at that age?
We've been expecting so much of players so young that maybe we've got a distorted view of how the development cycle of a player generally goes?
Are we going to make a habit of selling players at the first sign that they may be realising their potential before we even give them a chance to flourish here?
We might bring them back in their thirties if they come cheap and we're desperate.
If Nasri steers clear of injury I don't see any reason why he won't continue to develop and reach his peak at City.
He certainly won't get burnt out there.