I hear ya, same thing for me, hard work is all I know. Been cutting firewood and heating my homes since the late 1970's. I was out there yesterday cutting some 5-6' length logs to work them to the boiler. I use a grapple on my tractor, best purchase I ever made and should have had one decades ago, as it makes all steps of firewood cutting easier right down do pushing the brush into a big pile.
I also worked on power equipment in my shop full time for over 25 years. I own all three of the "series" here, CS-590, CS-600P and CS-620PW. I've tried for many years now to kill the CS-590 and it just laughs at me. What a great saw that has been and still is. The only thing that didn't last well on it was the laminated bar it showed up with. I run modded Husky bars on those saws now as it just makes more sense to standardize my chain loops for 20" bars, 72 count .050" .375. I have quite a few Husqvarna saws as well but have retired the bigger ones and grinding up the Echo's instead since parts for the Husqvarna's are difficult to obtain and expensive. I can't kill the Echo's and for the most part they've been dead solid reliable. The 600P ate a coil and carb, and now has CS-620P parts on it. All are stock with a minor muffler mod (opening up the exhaust and deflector). In my older years I use my 49-55cc saws more and more, all are set-up with 18" .325 semi-chisel chains as a lot of what I cut here are tops left over from loggin operations.
I had a CS-490 in the line-up briefly but you'll NEVER find yourself reaching for it if you have a CS-510 and a couple of closed port Husqvarna 55's close by. If I ever had the need for another 50cc saw in the line-up it would be a CS-4910 or 501P........