Only one ever died on me (brother spilled beer on it) and that was after 6ish years. The rest were upgrades to newer models. My current mouse (mx master) is coming up on 8 years and I’m debating between replacing the battery or getting a newer model but it still works as well as it ever has.
I only go for their higher end productivity mice so I can’t say much about their gaming gear. It seems like gaming mice, regardless of the brand, typically have shorter lifespans. Either that or gamers are just more vocal when there are issues.