Hmmm, I just looked up Cygwin to see what it is and what I learned is that the barrier to using GNU APL is too high for me with the time and knowledge I have available. I'll bet that's true for a whole lot of other people that would otherwise benefit from APL.

I just hope that someone outside of GNU APL with the ability to make a normal Windows install package isn't as enamored with Windows barriers and would like to see APL proceed. And I hope the GNU license restrictions allow for that.