My 40(ish)cc saws will cut the vast majority of my firewood. 62cc is my big saw and will pull a 25" bar through anything I have here just fine - I've never needed or wanted anything more than that. I enjoy getting the most done using the least fuel/energy and effort, and using a tool others think is too small and too inexpensive to work. That means sharp, narrow kerf chains, a few small tweaks here and there
, and proper tuning. I expect all my saws to pull the bars that are on them when buried.
But I know others like the feel of controlling the most energy they can hold. I guess that's never been my thing because I see that even the biggest, manliest saw has a pathetically tiny little engine on it compared to other machines we've created.
I also enjoy turning broken junk back into a useful tool, so the expensive or new pro saw thing just kind of bores me. The only thing that might drive me there eventually is that I'd like to get an AutoTune saw, as now poor traditional carbs are limiting any further increase in efficiency I can make. But if I wait long enough what is new will be old and broken.....