speakers and amplifiers, technologies that existed for decades
This is why I buy used audio gear. The basic guts of the stuff hasn’t changed much in the past several decades.
I bought a nice used head unit and speakers 10 years ago. They’re 30+ years old now and still work perfectly well.
I use Lemmy and like it, but I still have no idea what the fediverse is. Lemmy seems to work fine for me without this knowledge.
Tbh, I don’t think federation is a good selling point. It’s difficult to explain and understand for a general audience