These are great points. I'll try to address all of them. Multi-pass: We also do multiple passes, but thanks to comemo we can reuse most of the stuff from previ

These are great points. I'll try to address all of them. Multi-pass: We also do multiple passes, but thanks to comemo we can reuse most of the stuff from previous passes. The change tracking detects if a dependency on some other part of the document requires updating. This doesn't require file writing and reading; Typst has a built-in user-facing interface for these kinds of tasks. Data structures: Typst has typical data types you'd expect from a modern programming language and also typical imperative control flow like if, for, and while. What's a bit non-standard is that Typst enforces that all user-defined functions are pure (else we'd break incremental). Open Source: We do plan to open source the Typst compiler and CLI! Just not the collaborative web app.