Dave,
I think the answers to your original questions about vintage gear will be along the lines of 'it will sound good, provides excellent value for money, can be made even better with some updated parts, etc, but even then may not be the best that money can buy. But if you enjoy it, why not?'
My speakers are about 15yrs old. Everything else I am using is ~30yrs old. I like it. And value for money is great!
I think the answers to your original questions about vintage gear will be along the lines of 'it will sound good, provides excellent value for money, can be made even better with some updated parts, etc, but even then may not be the best that money can buy. But if you enjoy it, why not?'
My speakers are about 15yrs old. Everything else I am using is ~30yrs old. I like it. And value for money is great!