Native Instruments easily have cornered the market on VSTI's with breakthrough sound modeling, and they could stop there and we'd be happy but instead they go ON to update and improve and expand their products. B4 on its own is the best Hammond emulation around, and now NI is releasing updates and upgrades, instead of forcing users to instead buy b5 and b6 and b7.
I personally see the release of B4 as the point where vsti's started getting really serious.
