I really find anybody using even a gas lawnmower pretty obnoxious. If you are cutting an acre of land it is fine. If you are an old person I get the not changing.
Then you use a set of battery-powered tools that all run off of the same battery.
Making the switch makes the job much easier. Not needing to worry about needing access to power or venting CO2 when working in enclosed space in winter is game-changing.
With a system like Dewalt, you can basically do anything you want using only batteries. You can run lawnmowers, table saws, drills, air nailers, leaf blowers, chain saws, vacuums, mitre saws, hammer drills, hedge trimmers, grinders, and basically anything you need for most jobs off of the same battery.
I think a lot of people are resistant to moving away from gas mowers because the extension cord is annoying as hell and battery powered ones are still too expensive.
So you entered a rental agreement where you're responsible for mowing the yard, and you're also required to purchase the lawnmower to fulfill that responsibility?
I've only ever been in 4 rentals in my life but, yeah, that was pretty much the standard. One of the landlords left their lawnmower that we could use but it broke so we had to get a new one.