On the other hand, I had no idea that he was working full-time on it, and having money trouble.
Also: If you search for "GPG Koch" you can come across this comment:
https://news.ycombinator.com/item?id=6942254
EDIT: An example of development that is slow-coming: library support. Most GPG "libraries" in languages like Python and Ruby are just wrappers around the GPG command-line, because there is no proper library.