"Written in Rust" matters to very few customers of your office webapp. And you should add that it is $8/month for an online platform, not free or self-hosted.

What? Typst is open source and has a CLI, it's not just an online app.

I think the previous author is confused because if you google "Typst", you end up at https://typst.app, which seems to only advertise the web GUI and not the open-source CLI tool.