Can someone tell me the advantages/ disadvantages of stainless steel
running gear (prop, strut, shaft, and rudder). I remembered hearing
that it was a no-no, but I have nothing to prove either way.

A boat I test drove had this installed, and it does'nt make sense why
someone would dump all this money into the running gear if it provides
no additional structural, corrosion resistance, or performance
enhancements.

Thanks!