How much commercial use do Prolog or other logic programming languages see these days? The impression I seem to get is that Prolog, while never exactly mainstre

How much commercial use do Prolog or other logic programming languages see these days? The impression I seem to get is that Prolog, while never exactly mainstream, had a much more significant commercial foothold 30 or even 20 years ago than it does now; but I don't know if that's accurate.