Your luck with battery powered chain saws is far better than mine. I have 2 gas models and 1 battery powered one. The battery powered one is a weenie compared to the gas ones, and the battery is dead within half an hour of hard use. About the only thing it's good for is pruning.
I do like the battery powered string trimmers, edgers, and hedge trimmers. I even have a battery powered pole saw. The pole saw isn't as good as a gas powered one, but it does get the job done. None of the battery powered tools have to work as hard as the gas-powered ones. That's a good thing in that most aren't even capable of doing the same level of hard work.
I'm 75 and have certainly noticed the difference in effort it takes to start some of the gas-powered tools. I have an Ariens commercial tracked snowblower with a 14 hp engine. It's only a few years old, and usually starts on the first or second pull of the recoil starter. Even then it's all I can do to get it to turn over fast enough to start when it's 10* outside. It's much easier to just plug it in and hit the start button. It's running in less than 2 seconds.