Yea loads of them seem to be dying.
Sadly people only look at FPS benchmarks and not how the hardware is constructed. I've suspected for a while that Nvidia are building cards on the cheap, using components which are barely good enough. By comparison AMD tend to use much better quality memory (HBM2 these days), VRMs, etc which can handle the heat and voltage a lot better.
When you work in IT running large networks you pick up on the things that don't last and Nvidia cards are in that list, along with Dell PSUs and Seagate HDDs. The 20 series is clearly not well constructed and it's frankly shocking for the amount of money they are asking for them.