It's a niche thing. It's amazing, but there is maybe one golfer in 100 who could ever do this in anything close to the times put in by the best players.
Time-wise, they have to play first thing in the morning like the guy at Rob's club, as it's impossible to play through a bunch of other groups without hurting someone. The maintenance crew probably won't like them much, at first, but they would probably get used to it very quickly as the pace of play is very predictable. That's the only obstacle that I see to offering it at most courses, but there won't be too many takers.