🚀 go-pugleaf

Can someone familiar with the MPW shell and with UNIX shells (say
the C shell) summarize the differences for the net? I understand
second hand that the MPW shell has quite a different syntax (e.g.,
using many control characters that are not repesentable in ASCII)
but have heard of no advantages of the MPW shell over standard
UNIX shells. Since the two have closely related purposes, I
would have hoped (expected) that making the MPW shell nearly
identical to a UNIX shell would be a big advantage in terms
of portability between different computers, and reducing
the learning curve.

Does the MPW shell have features absent in UNIX Shells?