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.
That probably works well for people who are able to self host.
I use cloud password storage. I don’t have the knowledge, time, or inclination to self host.