I know the snorkel can go up pretty high but wouldn't the water level be a concern to the electronics inside the interior long before it reaches the top of the snorkel?
I remember seeing a nature documentary where they were driving Landcruisers through flooded swamps where the water level in the car was up to the bottom of the dash yet they had no electrical problems.
Maybe not right then, but they will eventually.
edit: This thread reminds me of a customer I had at a Ford dealership years ago, who had an F-150 that was the '4x4 Off Road' model.
They buried the front in a pond up to the F-150 emblems on the fenders.....so they said. There was actually mud much higher than that.
Anyway, they had a transmission problem, and it was electrical, not mechanical. My guys couldn't figure out the problem....the diag routine was useless....it said part xx was bad, but that didn't fix it. Showed a dead short in one circuit....we tried the parts on both ends of the circuit, and even ran totally new wires in that circuit and it was still there. Nightmare electrical concern. Nobody could have diagnosed it, it was just going to be a matter of trying things until you accidentally found the problem.
They came in to discuss it with the manager and I, (read: bitch about it) and during the conversation, the wife said "But it should be able to do that kind of wheeling, it's a 4x4 Off Road".
I said "Yes, but that's 'Off Road', not 'Offshore'."
My manager almost pissed himself trying not to laugh.