What does not make sense? Did you mean to answer to someone else? I only stated that Typst (the typesetting engine) is free to use and modify, and only the web app is closed source. Typst can be used without touching any web apps. I use Typst locally.
I made no claims about any mixes or claims about LaTeX.
It is very fast to learn the Typst math syntax. It is easy and intuitive and usually less verbose than LaTeX. It should not be a difficult thing to learn for most people.
There are already at least two publishers which accept Typst. So that "ever" part is already covered. But most still don't accept Typst and LaTeX is usually mandatory if the sources are required.
I'd also not overemphasize the significance of microtype features. They might help with narrow columns but on wider columnds the difference is very small and most people will never notice them at all.
Typst is fully open source licensed under Apache-2.0 license. It is not a mix of any kind. Don't confuse the web app with Typst engine. The web app is a similar service to Overleaf and that is closed source. It is not mandatory, you can use Typst fully on your local machine. The team tries to make money and cover development costs with the web app. But the actual typesetting engine is fully open source and free.
Yes, it uses a very similar algorith as LaTeX. It also incorporates already some microtype features out of the box. So the typesetting quality is very good and easily comparable to LaTeX. Working with Typst is so much easier and faster than with LaTeX so you will be more productive. Many things can be done without resorting to external packages and scripting is a breeze compared to LaTeX.
Just try it out. It is free, open source and very easy to setup. Just install the extension Tinymist on VSCode, that is all you need.
I made no claims about any mixes or claims about LaTeX.