Are you asking specifically for notes or as the development environment that I _do_ live in?

For notes I'm (currently) using Obsidian.md, which has many of the same benefits of the previously mentioned systems. I settled on it because it allowed me to easily import notes from the previous apps and they are stored as simple markdown files. Which means I can access them using vi if I'm on a system that doesn't have Obsidian installed.

While I enjoy VSCode, most of my development is done in Visual Studio. And occasionally vi/vim for smaller applications.