Ahhhhmmmm 50 50 -ever heard of "See and Avoid"???
Islanders I used to fly a few decades ago had the system installed. Can't remember what it was called now, but it sure as all hell wasn't Wig Wag. IMO a fantastic system, particularly useful in high traffic density and/or terrain confined areas. Should be standard. Works just as well with the old incandescent lights as it does with the newer LED's.