Sounds like my saw usage is more or less identical to what you describe.
Stihl MS 390 here. Bought it second hand three years ago for £250 inc new trousers / gloves / boots and hat from a pal who works for the FC so it saw (pardon the pun) a fair amount of use before I got it.
I’ve not done much in terms of maintenance other than clean the filters and give everything a good clean at the end of the fire wood season. Starts easily and runs smoothly with no excessive vibration. I can use it for 6+hr a day without any discomfort in my hands. There are lighter saws out there but I’m happy with mine.