Many models can be hacked to run https://valetudo.cloud which is completely local. I’m using it with a Roborock S5.
“If you’re really only looking for a general recommendation, just buy the Dreame L10S Ultra. It can do proper mopping, has an auto-empty-dock, obstacle avoidance, a rubber brush to better deal with long hair, it can detect pet waste, it’s priced competitively and it’s also rootable without doing too scary things. Basically it ticks all the boxes.”
Here’s a list of all supported robots:
You should be prepared to sending it in for a warranty repair, probability for failure seems to be 5 to 10% from what I notice on the Valetudo telegram channels. Check Google for other peoples experience with Dreame repair centers. He replaced the sensor himself, but that breaks the warranty seal.
Others than that, he's absolutely happy with it.
Check https://valetudo.cloud/pages/general/buying-supported-robots... for the list of recommendations. I've a L10pro myself and it works well, too. But looking at the prices, I'd get a D10s plus or pro myself these days (that is, if the L10su wasn't an option, since it has the superior feature set; I'd be willing to take the risk with the sensor and just swap it).
I didn't do the replacement, but it seems reasonably simple - the cylindrical sensor unit has a cable with a 4 pin connector and is clipped in place.
The new one doesn't look exactly like the old one and had different makings. I hope this means it now doesn't randomly fail.
900€