There is such a thing as too much penetration, and it is a worse problem than too little penetration. I once had the dealer run out of cards. Full table with half a deck cut off. Lots of small cards come out and a few splits. I got a pair of 8s and split, got another 8 and split again. There were 2 cards left after me, I was at 3rd base. I (correctly) predicted the last card in the shoe was small. The dealer had to hit again but there were no more cards. The pit boss voided the hand and everyone's bets pushed. Then the dealer cut off 1.5 decks from then on.