There are "top end" amps in A, AB and D, have been for quite a while. Not sure I understand why that would make anyone unhappy. I think it's pretty cool, both from a vintage point of view and newer designs.
Agreed.
I think a large part of this is aesthetic and manliness. Imagine in 10,000 years, if man still exists, that audio technology reduces the top end audio and multi channel systems to the size of a book.
Would we still be desperate to own the latest?
E