"Don't go out of your way to optimize prematurely" does not mean "architect your software in the opposite direction to industry common sense". "We will optimize later if needed" does not work at architecture level. That's why you prototype before committing yourself.
"Don't go out of your way to optimize prematurely" does not mean
It doesn't mean anything, because both optimize and premature are in the opinion of the viewer. There is no consensus on this at all, but it has been my experience that when those famous words are uttered, badness is about to occur.
