> Why can't I debug a function without restarting my program? Given the number of people here pointing out mature, powerful systems where this is totally, easi

> Why can't I debug a function without restarting my program? Given the number of people here pointing out mature, powerful systems where this is totally, easily possible, I think a more to-the-point question might be "given the availability of debuggable systems, why are systems that do not value this capability so much more common/used?" ...however, I have yet to see a good answer (or even discussion--people love to feel superior and defend their choices) to that question, and it comes up a lot.