True. Software is a must. Not just for professional level blackjack players, but anyone playing for decent money who is serious about their play. Some guys write their own software and programs. For those of us that don't have that capability, I always like to mention Norms software (Qfit Products).
Despite my issues with Norm, for about a decade now, which really stems from him allowing a player, T3 to make ridiculous claims that defied the math (sound familiar?), Norms products are the best. Can't imagine where I would have been without them. And if you have any issues, Norm will take care of it.