I don’t remember the last time I had something fixed under warranty, if ever. I have had infant mortality in a TV set, which I returned. Why do things fail so often for others?
But, given that they do, I prefer an amp I can repair myself. So I only buy point to point wired tube amps now.
I do remember while home from college I blew the amp in a console style stereo system (more furniture than stereo) playing Hot Rocks. I took it apart, found the overheated component and fortunately they had one at the local TV repair place. Had it back in service before my friend’s parents got home. that would have been around 1977.
Other components, like DACs, would be harder to repair myself. But they never seem to die. I have a W4S DAC so old that it won’t work with roon because it needs drivers installed on the streaming device--pre PnP.
Jerry