We have never really had issues with longevity of our saws. Most of the time the things that break are chain break handles, oiler pumps and occasionally a clutch will blow if new guys let the chain run tight for too long. Our stihl saws run great until they need a carb cleaning. We got a 500i when they first came out and after a year it started running terribly and wouldnt stay running. The shop told us we put dirt in the intake and fried the cylinder. We also supposedly dont use the correct 2-cycle oil when mixing. However all saws use the same fuel mix, both 201tc’s and Ms362’s. I believe we could have gotten dirt in it as those 500i doesnt have a choke to block off dust from getting in the saw. But the shop says we are lucky to get more than a year out of a pro saw for as much as we use it. But we use it far less than a 201t and those last a minimum of 5 years. Some we have had for close to 10. What are everyones thoughts on a good life range of a top of the line saw. Are old school saws just inherently better built?