I have 2 stihl backpacks and every year I have a starting issue. Nothing has broke yet but I had clogged filter screens, gas in the muffler, and just random nonsense.
The shindy after 3 years needed a carb kit.
The redmax after 5 years is in the shop right now for a no start issue.
I havent had a problems with the others besides what is mentioned but the stihls have a issue once or twice a year. There not junk like echo but are high in maintenance.