Apparently robotic lawnmowers work pretty well these days, though it sounds like only one might not keep up if the lawn needs regular mowing that often.
You can never fully automate lawn work because a big time sink is actually stick pickup ahead of the mowing. Also, every property is loaded with edge cases.
This is true! But apparently the whatever percent that can be automated has crossed the line and become "worth it" for some.
It's also worth noting that owners have changed their behavior to favor their robot vacuums, though I have not read any similar examples for robot lawnmowers yet.