In case there is interest in other implementations of TeX: I'm collecting the ones I know here: https://github.com/tex-other https://github.com/tex-other and ha

In case there is interest in other implementations of TeX: I'm collecting the ones I know here: https://github.com/tex-other https://github.com/tex-other and have an answer here: https://tex.stackexchange.com/questions/507846/are-there-any-non-web-re-implementation-of-tex-core-in-recent-years/507930#507930 https://tex.stackexchange.com/questions/507846/are-there-any...