I can agree with that. I think the problem with these sorts of discussions starts when someone dismisses promises, at which point one must assume that the pers

I can agree with that. I think the problem with these sorts of discussions starts when someone dismisses promises, at which point one must assume that the person dismisses the problems that promises solve. And I think that happens in the other direction too, when someone dismisses callbacks which suggests that they think that callbacks are intractable in all scenarios.