I felt like neither side really answered the question about how they planned to address addictions in the US. They both talked about the US-Mexico border and trying to catch more imported drugs, but failed to address domestic production, and more importantly, failed to answer how they plan to address addiction in the US (as in current and future addicts).
Also, the whole question about physical ability diverted so off topic that I lost what they were even talking about. Biden seemed to try to answer it, but then it took a sharp turn towards weight and golfing skills?
Edit: I should also add that yes, Biden tended to stay on topic more. Trump always seemed to be answering a different/previous question instead.