...er. I've had no reason to change anything, as I've been completely happy with the B&O. I think that's a lot of B&Os philosophy, sell you something that is satisfying to your senses, all of them, and that performs well and is easy to use. It's also part of the difference between B&O owners in general and audiophiles, I doubt most B&O owners churn equipment like most audiophiles do. We tend to get what we want, and just use it to listen to music.
For many it's also a way to work on old gear and restore something they feel is actually worth restoring.
Right, I have had my BS4500 for 22 years now, exterly happy with it, and no reason to change. 😁