Gathering bunkers are simply very hard to build in the modern era.The same contours which draw a ball into the bunker will also, unless one is very clever, bring in drainage water. In the old days of hand-built links courses upon a sandy base, this was no problem. But today, when the entire course has been run over with heavy equipment 40 times to seal up the soil, and golfers demand that the bunker sand be perfect and uncontaminated, letting drainage water go into a bunker is a sin.Most gathering bunkers are also difficult to see from the tee, and everyone condemns a blind hazard.I would love to build more of them, but it's very difficult to do.