Just think of the average customer. They go to a retailer one day and see GT6. They see all the features, some on disc, some coming soon. They might look at some videos, might read a review but that's it. They don't visit forums, they don't constantly check developer websites constantly. They play through the game on release and notice things are missing. They come back to it a couple of times over the last few months, still no missing features. They're annoyed but they aren't the type to go online and search, come here, they just shelf/sell the game. They never see the remaining updates, they never see Kaz' final 'vision' for the game.
Now think of those people when GT7 turns up. "Ah, I liked that game but they never finished it which was stupid". It doesn't matter if PD did update it eventually, this guy doesn't know, he moved on with the negative impressions the unfinished game left him. Now he doesn't buy GT7, or knows to wait a few months so he knows it might be more finished.
I have a hunch this happened with a lot of the millions who bought GT5 in the first year and will happen again with GT6. This is the big problem with this way of releasing games, the casuals that make up the millions don't stick with it long enough.
