I can't remember ever having a receiver fail. Every receiver I've owned still functions. If I visit my dad, he still uses a receiver that he got in the 1980s.

Older receivers (1980s) can blow an output transistor, which is a pain (fixable if you are skilled). Newer receivers are often built with integrated power amps that have extensive protection circuitry... they're truly impressive, and hard to accidentally damage.

I've done some amplifier repair work. The amplifiers I repaired were typically much older (1950s, 1960s). The most common failure modes are fuses blowing, potentiometers failing, capacitors failing, and PCB-mounted jacks failing.

I still have a 1970s model head unit that sounds just as good today as when my dad passed it down to me as a teenager in the 90s. The thing I loved about it so much is it had A, B, A+B mode so that it could drive 4 speakers. It wasn't quad, but I could put 2 sets of stereo speakers in different rooms.

Yamaha