There are so many different designs, I don’t think they can be clumped together.
I’ve had my Primare I32 integrated since 2017 and it’s never missed a beat. I also had a Nord NC500DM and that likewise was faultless for two or three years. (I sold it to fund the Pass Labs, a class A design).
I recently bought a Fosi v3 for fun and that’s been excellent so far. That’s the nearest to ‘disposable’ thanks to its modest c.£100 price, but there’s not much to go wrong.
What type of amp are you thinking about?