Agreed. I have a 6.5 year old Roborock S5 Max, and it still works fine. I've replaced a few parts (can still get on AliExpress), but other than that no issues. It's cleaned 74km2.
Ordered one off Ali Express, and after another couple months, it also started dying. So replaced it with a newer Roborock.
Didn’t bother when the second S5 started doing the same, just got a new Roborock.
Both new ones have been going well so far, and while it does seem to be good for replacing parts (I had another lidar part fail, and the replacement was easy), I was disappointed that replacing the battery didn’t fix the shut down issues.