hah! interesting theory on car maintenance there. Need to consult the science, and will get back to you.
see @jji666 ’s post above. Tubes on DACs make sense because there is an analog signal involved there.
You don’t have to prove anything to me - I try to be very inclusive.
I had a used 2000 Audi A4 closing in on 100k miles; was due for a new timing belt, which would have been $$$. When I checked blue book, I realized that my speakers were worth multiples of my car. That’s when I got my 2023 Golf R, which I still have 10+ years later. Have decided not to check blue book again.
yes, precisely why I feel compelled to weigh in on these issues when they come up, just to provide an alternative resource for those who are trying to sort things out for themselves.