It's nice but it's slow. Would love to have a solution that combined Notion's capabilities with Sublime Text's speed and maybe JetBrains's ability to work with keyboard shortcuts.
You might take a look at Obsidian. For me it’s the best of two (or how many you like) worlds. You can sync your files via git or a cloud service of your liking. What bugs me is that it’s not open source but what makes it great is a lot of open source developers contributing plugins and themes.
Oh, I did. It looked real nice but I'm not there yet. Sticking to Sublime Text for the time being but if I were to switch to something right now, I'd be Obsidian.
I know it's biased because it's an opinion from a competitor, but it's interesting nevertheless:
Have you considered adding a capability for plugins to draw HTML into an <iframe sandbox>? I'm always pondering such features, but I'm wary of letting a plugin potentially block the CPU forever with custom <script> elements. I have a solution to plugin CPU blocking for pure API plugins (https://github.com/justjake/quickjs-emscripten) but not a way to meld it safely with HTML access.