When u look at alot of the Sega machines (stern prior to stern) there are multiple code updates on almost every release, same with all the other manufacturers during the 1990's DMD era. If u look up almost any title on the Internet Pinball Data Base, they all have software updates, even Bally/Williams, Gotlieb, Data East, Sega, you name it.

So, to me, this code upgrading has been going on well before Stern called themselves Stern again in the late nineties, 2000 etc.

The code updates for Avengers is huge etc, wait til u see the code updates for WOZ, they will be just as big, because as ANT said, this game has alot of hardware and a million things to do during gameplay.
Without any doubt, I reckon WOZ will be the most advanced Pinball Machine ever made to date.

I will be a buyer again for sure, IF the local price is reasonable. Bringing one in direct from JJP may be worth investigating very soon as well.
I will have to settle for a std model, but maybe I can get JJP to pimp it out with extra stuff to make it very close to a LE......