Instead of chewing up 2 of the 18 remaining English letters whose
meaning following an octathorpe (#) is not yet specified in Scheme,
and creating a minor incompatibility and permanent ambiguity by
giving a second meaning to one of the six letters whose meaning is
already specified in that context, why not consume just one more
octathorpe character (say 'v' for vector) as follows:

    #vs8(...)
    #vu8(...)
    #vs16(...)
    #vu16(...)
    #vs32(...)
    #vu32(...)
    #vs64(...)
    #vu64(...)
    #vf32(...)
    #vf64(...)

Then some future SRFI for vectors of vectors of floating point numbers
(or whatever) will have a notation that can be extended for the purpose,
and we won't have to have this same discussion all over again for the
second time, redundantly.

Will