PGP is hairy and many developers don't have it installed and configured. It's full of non-obvious options and capabilities. SSH is a common tool which most dev

PGP is hairy and many developers don't have it installed and configured. It's full of non-obvious options and capabilities. SSH is a common tool which most developers have installed, keep in a working order, use often, and reasonably understand. Guess which tool is easier to piggyback on and achieve easier and faster adoption.