I use it and prefer it to VS Code

Running tests in it is easy
Git integration is nicer (IMO)
Needs less plugins than VS Code
I can generally just install it and start coding

I have randomly started having it freeze and have to force quit

I got round this by the link talking you to a page that had a button/link you needed to click which used the token from URL params.

So outlook could open the page and the token wouldn't be used because outlook wouldn't click the button/link to log in.

Not ideal but gets around the problem.

I think it's good. I'm not sure any buyer would put as much resources into it's development.

Previous and next with some kind of CSS selector

Good point, I guess I'd always thought of CSS-in-JS as doing something at runtime but like you say some of the newer libraries don't do this but are still definitely CSS-in-JS.

Is CSS Modules a CSS-in-JS solution? I would considering more of a post processing bundler thing...