In our neighborhood and surrounding area, most homeowners employ gardeners. We do not. They all use ICE lawn mowers and leaf blowers. (The phrase mow, blow and go comes to mind.) They use very few hand tools.
Besides the pollution from the exhaust, those leaf blowers kick up a lot of dust and dirt.
The gardeners are independent contractors, so the faster they complete a yard, the more yards they can complete in any given day.
Before we yanked out our sorry excuse for a lawn, I used a hand reel mower. We replaced the lawn with stamped concrete that was surrounded by almond bark covering the bare dirt where we have shrubs and a couple of fruit trees. Drip irrigation to water the plants. My wife purchased two(!) electric leaf blowers--one with a rechargeable battery, and one that plugs into a 110. They both work quite well.
Personally I prefer hand tools for most yard work. I still use a broom, rake and dustpan to pick up the bazillion leaves every November from a 50-foot gingko and three 50-foot pin oak trees.
When I am done, I feel like I earned that cold one that I pop open.