It is still beyond me why LR puts sensitive equipment under the seats down low where they are more at risk.
Agreed, but let's be honest, with the technology of today's vehicles, this is no other place to put them.
I have had the water over the door seals a few times with not a drop inside. They are great for fording but not meant to be a submarine! And, the door seals are super easy to replace and relatively cheap. Well worth it IMO!
But.....either way the alternator is under water so driving out of there was slim to none after about 5 minutes.......lol