You can also program alternate tunings, so that you can do nonstandard tunings and open chords (Joni Mitchell used this extensively on a recent tour as I recall

Dang, now all of Joni's shows will be, like, 32 minutes long!

I can play all of about 6 chords and haven't had a guitar in years, but that git sounds interesting enough for me to have to check it out. I could waste at least a few hundred hours mucking around with that!