[maxerickson]

A better way to say what I was getting at is that a web browser that finds itself with a silly window size might better serve the user by only using a portion of it for the viewport.

This way a page with no extra width styling still gets presented to the user in a sensible fashion. It's probably a looser coupling than insisting that every page anticipate and handle the screens it might be viewed on.

[vinceguidry]

The browser shouldn't be dictating how the web works. It's the creator's job to manage the complexity of presentation, you can't just push that responsibility onto your tech stack. The domain and expected use cases for web apps is just too broad for any browser to be making decisions like this.