Ask HN: Is there a reasonable, actually integrated Web IDE out there?

It's kind of silly. There are design tools that don't let you write JavaScript. There are JavaScript tools that don't let you write server side JavaScript (or any other language). There are server aware tools that don't let you run on your own servers. And that's before discussion of collaboration et al.

Is there a reasonable workflow out there?

If you set up a node.js project with Webstorm through the Webstorm UI and deploy with a plugin or built in feature you've pretty much get the most fully integrated IDE there is for node projects. It has testing built in, debugging inside the IDE, dynamic updates your browser, supports a ton of JavaScript libraries and npm as well as React and ES6/ES7 syntax. There's nothing else really like it.

IntelliJ based browsers haven't been slow in a long time, but they're even faster now, just be sure you exclude node_modules and library directories by right clicking them and things will move pretty quickly.

Although their focus has shifted to education, Codio is my favourite Web IDE

https://codio.com/features/ide/

This thing? https://hyperdev.com