Interesting. Reminds me of Typst (both implemented in Rust and replacing TeX to some degree) and Microtex.
I have been using Typst for creating notes and it is an awesome tool. I use it to create notes on welding for my students. It makes my life so much easier compared to badsoft and its not-word-ing (you understand me).
I've discovered typst in the last year and used to build a resume and cover letter template that feeds from a YAML file.
After a bit of tinkering and understanding the idiosyncracies of Typst, the joy of having reliable, consistent, beautiful, data-driven resumes and cover letters is not measurable. It basically lifted any barrier to applications, while whatever I had before I had always considered a burden.
On top of that, I can add hiring process data directly to the yaml file to run further analysis.
Can LaTeX do this? Most probably, but the learning curve is the difference.
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I greatly prefer Typst's clean architecture than TeX's macro-centric hell pounded into passable utility.