Any high revving 2 stroke will naturally beat its self up....how bad it gets depends on how hard you ride, maintance schedule, conditions, ridier ability, premix ratio etc....and an engine that makes more power has a tendency to be harder on itself.
If youre going to replace the rings, then you already pretty much just rebuilt the top end. Change the gaskets and you'd be good to go.
I rebuild once a year, I keep a tight maintence schedule and mix my gas the same every time, and I beat the shit out of it. I have never (knock on wood) have had ANY major failure yet. but yeah you could go 2-3 years w/o a rebuild....but wjy take chances.....