I remember Hy! It blew my mind back in 2014 and is still cool today, it's great to see it still going and congrats on releasing 1.0.0!
Also great timing after the recent Python Preprocessor post: https://pydong.org/posts/PythonsPreprocessor/
Could Hy hypythetically be implemented as a preprocessor like https://github.com/tomasr8/pyjsx?