I'm excited to see that Alex Warth is involved with this. In my late undergrad days, I was really excited by his OMeta language. It turned out that I'm actually

I'm excited to see that Alex Warth is involved with this. In my late undergrad days, I was really excited by his OMeta language. It turned out that I'm actually really bad at writing PEGs (or even ANTLR grammars), so I wasn't the best candidate for advancing OMeta into common use, but the idea is really compelling.