I understand they're a lot more common in the EU than in the US, but while I've seen robotic vacuums (Roombas), I've never seen a robotic lawnmower, and haven't

I understand they're a lot more common in the EU than in the US, but while I've seen robotic vacuums (Roombas), I've never seen a robotic lawnmower, and haven't used either yet.