> I usually use pandoc for converting my Markdown

See my Typesetting Markdown series:

https://dave.autonoma.ca/blog/2019/05/22/typesetting-markdow...

> Is there a specific reason you picked ConTeXt?

LaTeX:

* doesn't (easily, or practically) separate content from presentation;

* has arcane, antiquated syntax;

* packages can have namespace conflicts (rare, but happens);

* requires package installation for additional features.

ConTeXt, being monolithic and newer, avoids all those issues. The feature matrix lists a number of samples typeset with ConTeXt:

https://keenwrite.com/blog/2025/09/08/feature-matrix/

FWIW, pandoc has the ability to generate ConTeXt code.