I made a triple layer chocolate cake for a friend's birthday cake the other day and I learned the hard way about one major pitfall of such an arrangement when the top two layers slid off the bottom layer while in transit (or to be specific, while I was stopping off at IBU to pick up some beers).
I managed to nudge it back mostly into its original triple stack formation, but it was still quite messy because the cake has a super soft and moist crumb (which remained in that very state for many days to come!)
I'm definitely making this cake again as it's a chcocolate lover's delight (and I be a chocolate lover) but I think I'll take more care to make sure I have even middle layers of frosting o there's no sliding at beer stops.