If you want to ship a product so that it becomes commercially successful, you often have to "deeply taint" this clear vision to make the product compatible with the multitude of very inelegant (industry) standards that customers expect/require.
Thus the nostalgia is not about shipping vs not shipping, but about keeping an elegant vision or be willing to taint it to be compatible with a "depraved" world.
Then you start trying to bring the New Thing(r) into the Real World(tm) and there are 5000 edge cases the original project dealt with in a 42-page if/else block for 270 different OEM patches that were sold by some JV team in another building who have never written a line of code in their lives.
If only we had done X, if only this group had succeeded instead of failed in the past... I do agree that it's a way to avoid looking at the actual implementations and details of a real thing, and just go to what might have been directly.