I started writing AJAX callbacks in 2004, and I'm sure I wasn't alone, so 11 years of higher-level JS is certainly a better range. But we should abstract away

I started writing AJAX callbacks in 2004, and I'm sure I wasn't alone, so 11 years of higher-level JS is certainly a better range. But we should abstract away from the language. We've had 35+ years of experience of designing and implementing user interfaces, including their design patterns (MVC, Action/Event based). History is filled with successful designs. Just consider a sophisticated tool such as your standard IDE: do/undo functionality, separation of concerns, event based, MVC, good standard graphical toolkit, easy deployment and upgrades. These designs are not new, and date back to at least the late 90's (Delphi). What changed? Well, we've been doing incremental design: throw something at the wall, see what sticks and debug the hell out of it while adding new features. Perhaps that design philosophy is not very tenable in the long run.