For me the lure of diving DT wore off long, long ago in the 80's. It's still a dive that is always requested with the groups that we lead to the island, even today. Knowing the hazards of the swim through and depth, I have no issues being selective of those that are 'invited' to do the dive. I'm also fortunate that the operator I currently use also limits the ratio to 4:1. This hasn't always been the case, having used operators that called it a normal dive.