> Let the browser become a user agent in the full meaning of the word. Few web sites need their own styling or navigational structure. Finding information would be much easier for the user if all websites are presented in the same format, completely decided by the user.

You are correct that this would be the better^tm solution. But it's so far from reality that it might as well be impossible. Branding, UX Design and Marketing are far too entrenched to give up their turf. What you end up with is another Gemini Protocoll that a few nerds use and the rest of the world doesn't care about.

We need a solution that can deal with the same level of complexity as browsers but in a cleaner, easier to implement and far less legacy loaded manner. Something like a combined new HTML CSS frontend layer, with a decent sandboxed webasm-like virtual machine (preferably hardware virtualized) with clear boundaries and a decent, forward looking standard.