refer to things that didn't/couldn't have
internal mass storage
interfaces as
toys and allow that things that did/could have them as computers.
An amazingly strange and irrelevant distinction!
Where was the mass storage interface of a 360 physically located? The
disk drives were NOT in the same box as the CPU.
I sincerely doubt that putting the disk controller inside or outside the
CPU box has any significant effect on the Zuse number of the computer.