Also, there sometimes ARE interrupts meshed in with these main loop based systems (for whatever reason). They just aren't predominant. If your willing to through more hardware at things, you can typically always transform anything into a buffer.

This is a great example of a little knowledge being dangerous. There's a reason control systems are not implemented the same way as a browser DOM. There's a reason control systems are designed to avoid subtasks, conditional execution, interrupts (as much as possible) and complex data models. The reasons are pretty damn solid, IMO.

Conceptually, you can talk about the two domains as being somehow equivalent. That says nothing about the appropriate implementations.