Ooh, look at that page telling you how open source Typst is, and how *you* can contribute.
See at the top of the page the link to their pricing, where they'll sell you back your contributions; you can even "Reach out" to them in supplication and they'll discuss how much you'll pay to run your copy on-premise.
Yes, the command line parser/formatter is free and on Github, but then it is competing with projects like pandoc, which also provides a "modern" (whatever that is supposed to mean) input.
> It's sort of LaTeX on steroids with a built-in scripting language
Huh? TeX (and therefore LaTeX) is a Turing Complete language, used to write, well, LaTeX. And if you prefer a more "normal" scripting experience (TeX, like every language, is most easily used for some domains than others) then there are well-supported variants with that ability as well: LuaTeX being the one with traction. Given all the packages for handling all sorts of document tasks that have been created over the decades, saying that *any* new project is "LaTeX on steroids" is making some pretty big claims! The Rust/Typst community is writing addons but they've got a way to go (didn't get any hits for their replacement for TikzDucks, a vital resource IMO!) and to demonstrate that they've got the longevity required to be *sensibly* used by the sciences[1].
(Probably coming down a bit hard, as new projects & ideas are worth encouraging, and beginning from a Markdown-alike probably *is* easier for people to *start* with than LaTeX, and I freely admit to using Markdown etc more than LaTeX in practice, but ... having spotted that the pronunciation guide for "Typst" makes it clear that the ending is meant to sound like, and evoke, "hipster" - bleeugh)
[1] There is a massive problem with long-term archiving of materials; any plain-text based format is an improvement but you still to know how to process that to recreate graphs and diagrams. LaTeX has its flaws *but* it also has demonstrated ability for widespread usage across platforms.