Client-side includes would have been useful. Could have mostly avoided the need for frames and iframes, which would have saved time and effort. XHTML was a big

Client-side includes would have been useful. Could have mostly avoided the need for frames and iframes, which would have saved time and effort. XHTML was a big distraction. I wish the whole thing had been avoided. Dynamic HTML was really cool at the time, but the divergence between Netscape 4 and IE 4 was a real pain — I wish they had agreed on standards earlier. Lastly, the way Microsoft screwed over developers when they 'won' the early browser wars, and then abandoned work on IE for 5 years after version 6, which left the web to stagnate. I wish someone could go back and force the fuckers back into the game.