That’s sorta the case with frames and asynchronously loaded stuff anyway though right? I think they just consider the problem solved in practice through scripting and frames. Besides, HTML doesn’t have room for that— they need room for all the features nobody uses and cares about. XD I’ve been writing HTML to some extent for 30 years and I periodically come across shit— not even new shit— that I swear I’ve never even heard of.
I’m not sure how it could possibly make the problem worse if the problem is already endemic to modern websites in a form far more heavily used than that ever would be.
You could cache the intermediate bits. Hell you could do this right now (somewhat) by doing script src=menubar.js and the script containing document.write calls. Not great for performance.
