Why? Don’t get me wrong, CCR in a cave is great, but Mexico is far superior to Florida in terms of open circuit dive length and depths. It’s hard to argue for helium in the average Mexican cave depths but really easy to argue the safety advantage for 30/30 or 21/35 on up in the main tourist areas in Madison/JB/Ginnie/LR/etc.Mexico is definalty on my bucketlist, after I get a rebreather lol.