You're right, ported vs stock is similar to the displacement thing. We get to a point where we think that you can't get by without a 70cc saw, but so much wood is cut with 45-50cc saws, or even smaller. Gal I know has a little MS180 with that rubber band starter that Stihl has. Little 14" bar. But she has a bum shoulder and that's one of the few saws she can get started. I tease her about it, but she puts up a very impressive amount of wood with that thing. She has some property, and can stay within the saws capability. And I go over and lend a hand on the bigger stuff now and then.
That all being said, I'm sure not going to be giving up any of my 60 and 70 cc saws, but small saws do get more work done than they get credit for here on these sites.[/QUOTE[
My 87 year old dad uses one of those. ( i took all his big saws away). He sells a lot of firewood. Probably what I'll be using if I make it that far.