There's no machine that does exactly what I want, and maybe there never will be.

The Yuka Sweeper is the closest thing, and the Roborock Saros isn't a lawn mower at all.

I want a machine that sweeps up the painful little caltrops deposited nightly on the patio by the tree that shades the pool. They're too big for a robot vacuum.

Picking up sticks from the mowing path would be great, but Saros can barely manage a sock, so I'm not optimistic about that technology.

I think the industry will, within a few years, build a reliable robot that satisfies the rest of my needs.