For so long if you had even a small yard you had to have a mower, an edger, a hedge trimmer, a weed wacker, maybe a small chainsaw for standard homeowner tasks throughout the year. Each of these had small gas motors in them that required priming, starting, gas, oil, lubricant (for chains and other things), and potential tuneups of the throttle and small components like that. It was honestly a huge pain.
The worst is that you had to have all these small gas cans around the garage that were premixed with different ratios of oil for many of these engines.
For a homeowner you needed these tools to keep your yard looking good. But they don't get an abundant amount of work. You might fill a weedwacker up with fuel 2-3 times all summer. A hedge trimmer once. Then in the winter you need to try to drain the fuel so bad fuel didn't rot in there. Then undo it all in the spring. It was a lot of work and small engines just deteriorate while sitting still.
We have seen electric tools in the form of drills and drivers for a while. But they had never been powerful enough before to operate a huge lawn mower or weed wacker reliably. Now they are and it makes home lawn and garden so much nicer. When you start one of these tools you only have to make sure the battery is charged. It starts with one click. No priming, no mixing oil, no winterizing. Not to mention it is quieter.
I get that professional lawn care might still need the power of gas tools for a while longer, but homeowners can finally kiss that world goodbye. I replaced my mower about 5 years ago. Then the next time I had trouble with the weedwacker I replaced it with an electric one of the same company and batter system. Since then I have bought a leaf blower, a hedge trimmer, and a small garden tiller, and a pole saw, all that use the same battery system. It has been amazing and truly simplified my life.