Interesting, what languages are supported? I did not see a list, only the comment “multiple languages supported”. As others said diagrams sell but notoriously hard in practice due to the “hair ball” problem.
I suspect from how "MVP" their site is, plus only NestJS actually has a "use" button instead of a "request demo" button, that the only thing currently supported is NestJS based javascript, and this is a way to test the water if they should build other languages. I could be wrong, ofc.