[wtetzner]

I always thought the approach of returning XML from your web server and having it refer to an XSLT stylesheet made the most sense. Unfortunately, XSLT is a very verbose and clunky style language. If it had been a better language, I think it could have been a good solution.

[klodolph]

I think component systems like React are the closest we have to achieving that dream. This is why Vue, React, Angular etc. all look something like writing your own tags and then implementing them in terms of, eventually, standard HTML tags.

You can even swap out the web browser front-end, to an extent. I know that some mobile apps are done this way.