I felt this way about 8088-era motherboards. So a
number of years back
I scrapped them. Now, I've found that it's fairly difficult to track
down an XT motherboard.
I suspect finding a PC motherboard -- with a cassette port -- is even harder.
Why would you want one? Well, the Microprofessor MP1/88 is an 8080-based
machine with an IBM PC compattible cassette port (and no other built-in
storage). In theory you can cross-develop code on an PC, save it to
cassette, and load it in to the Microprofessor.
-tony