I ran into a couple issues using ANTLR 4. The first is that it mostly required my build pipeline to have a JVM, which wasn't super convenient. The second is tha

I ran into a couple issues using ANTLR 4. The first is that it mostly required my build pipeline to have a JVM, which wasn't super convenient. The second is that the generated Python parsers are super slow, like too slow for even just iterating while developing. I almost wish ANTLR 5 wouldn't be about any new parsing stuff, but just a refocusing of the project on implementing its compiler-generator in the popular languages. It basically is that already, but it's pretty clearly not first class.