Actually the opposite is true for me. Most of the problems I see with Stihl is due to not being used enough, So bad fuel, bad fuel lines, carb issues. And damaged cylinders, which happens to all brands. Most of the Stihls that I see have a lot less hours on them then the Dolmar saws that I have sold. Most of the Dolmar issues that I see are more major, but they tend to have 5-10 times the number of hours on them compared to the Stihl saws I work on.
My personal saw line up is actually another brand that I sold prior to Dolmar called Solo. I have a 650,662,667, and a 694 and one Dolmar ps-5105. the 5105 will out cut the 662 and 667 even though it is only 50 cc compared to the 62 and 67 cc of the other saws. the newest of the solo saws is 2004. My first saw that I purchased was a 1995 029 that I had taken to the woods to cut firewood, and then had to turn around and go a mile back through the woods to get a small screwdriver to adjust the carb, because the dealer had see it too rich, and was 4 stroking under load. Then I purchased the 017 which I had mentioned before which I owned about 3 years, Besides the carb issues, I had issues with it breaking the cutters off of the chain when cutting oak. That is a problem with the .043 narrow kerf chain used on those small saws. I won't even stock a saw on the shelf if it has that chain on it. .050 gauge or else.