I was last in LV circa 1998, but paid little attention to Blackjack as ours was part of a vacation trip to Grand Canyon, etc.
BTW, best strategy for the House is to hit soft 17 except in the case where Six is up and Ace is the hidden hole card. (I dimly recall reading that a few casinos do adopt that variable rule.) The players have stood on their bustable hands (12, 13, 14, 15, 16) and you can hear the groans when the Dealer flips that Ace in the hole. (And no, hitting bustable hands against Dealer Six is not a viable countermeasure! :smack: )
Here’s another example where casinos don’t always follow odds: For a while I was interested in Pai Gow (the tile game, not the poker variant). Caesar’s Palace had a rule always to keep Je Joon when available “because it can’t lose.” But even without doing computer study, it’s easy to see that if the other tiles are, say, 5 and 6, splitting the Je Joon is much more profitable. (Splitting is also very unlikely to lose, but is also much less likely to tie.)