Comment by godelski

  > I don’t know why you think it’s dumb that they purge the data when you turn a feature off. That’s what you want.

I think you should have read the other comments before responding. There are multiple solutions here. And note that my answer is suggesting a delay so we don't hammer the user's computer. Toggling should schedule the event, not initialize it. You've over simplified the problem, treating it as if operations can be performed instantaneously and that they are all performed locally.