Well guys I got a Xiaomi Roborock S6 for a decent price the other day (£435 with 5 year warranty, so works out at £87 per year for my own personal cleaner that works every day without complaint) and I got the black version which looks really damn cool and goes with my decor. I have it running now on Max suction and it is crazily quiet vs my original Mi Robot. It has the newer mapping and persistent map software and seems to be doing a very methodical job in covering the rooms. Apparently it will automatically create room zones when done so I am looking forward to having permanent maps where the robot always knows where it is, because my original Mi Robot used to easily get lost if you interrupted the cleaning cycle. Will also be interesting to see how it deals with my carpets and narrow areas where the old Mi used to get stuck sometimes. I do admittedly need to buy a new and more robot-friendly carpet without black bits though.
I will update you all later when I see how it performs after some full cycles.
PS: If you already have a Roborock S50 then it's very similar except with some new software features.