For personal notes I mostly use Notion. But for a while I used Obsidian with markdown files stored in a Git repository, this mostly worked fine.
In a professional capacity I use Docusaurus for project documentation, this is stored in the same Git repo as the rest of our products source code (so one monorepo both for code and documentation).
In a professional capacity I use Docusaurus for project documentation, this is stored in the same Git repo as the rest of our products source code (so one monorepo both for code and documentation).