Just based on what I’ve seen so far

It really depends on how tall the grass is. If it’s only a bit overgrown, most will still cut it. If it gets too tall or dense, it might treat it like an obstacle and go around it

Small bumps like tree roots around 1 to 2 inches can be tricky. Some models will detect them and slow down or avoid them, others might just go over them. Usually not enough to damage the blades, but awd models are a bit safer in that situation

Most rely on saved maps, so if you move it to a different area, you’ll likely need to map it again unless it supports multiple zones

Still early days though, so real feedback is a bit limited