Bought a Sony receiver around June 2021. The thing has barely had time to get dusty and its never been over ~20W. It's already dead, or dying at least. The power supply caps are bad and it power cycles itself when it tries to drive the speakers.
It's not a high end model; I'm not an audiophile trying to get 0.001% THD at 10KWs. But lunching itself 25 months into a 24 month warranty... wtf.
Have you tried bringing it back to where you bought it? Depending on where you live, failing after 25 months may not be okay, regardless of what the warranty says.
Essentially: electric motors from the 50s were vastly over designed, which meant they were extremely robust to physical failures
The larger point about stuff now vs then is likely the use of capacitors. And specifically, cheap capacitors in consumer electronics.
Absent electronics, you're talking an order of magnitude longer lifespan.