Ergonomics isn't really the point of a hypothetical extreme system. And no, you can compute offset as a result of all inputs to the system, like I did in my ex

Ergonomics isn't really the point of a hypothetical extreme system. And no, you can compute offset as a result of all inputs to the system, like I did in my example - just keep passing a "previous state" value around, and compute the next state and return it. Like any other functional system already does 99% of the time.