[falcor84]

How is that a contradiction? You are saying that by the time the products made it to become external SPIs, they were already battle tested, right?

[lrem]

That's true, but I wasn't trying to contradict, only explain why some Google's products feel so polished since early access. Also explains why some designs may feel awkward: they were assuming the user to be Google products, with all the ballast of building for a billion users.