> But in practice I bounce back and forth between two languages right now (Go and Python, neither of which have such a standard parser ecology)

https://pypi.org/project/pybison/ , or its predecessors such as https://pypi.org/project/ply/ ?

But yes, the decidedly non-traditional https://github.com/pyparsing/pyparsing/ is certainly more popular.

To add to your survey, I have been reading the lark documentation https://github.com/lark-parser/lark and like the cut of it's jib, I have not used it yet as I don't really have any projects that need a full parser.