Simulations run by several blackjack experts, John Auston among others, show that the correct usage of risk-averse indices improves player's performance by about 3%. Now, you may think that 3% is not that much, and may not be worth the extra trouble. In general this could be true. But the point is that the 3% improvement comes with practically no extra effort! The only change is that few indices have different numbers. Today players strive to achieve extra few percent improvement and are often willing to change their counting system. Here you can reach the same improvement by just changing, say, 10 index numbers.
