[topspin]

That's not "strange" to me. Object storage has been a long time coming, and it's still being figured out: the entirely typical process of discovering useful and feasible primitives that expand applicability to more sophisticated problems. This is obviously going occur first in smaller and/or younger, more agile implementations, whereas AWS has the problem of implementing this at pretty much the largest conceivable scale with zero risk. The lag is, therefore, entirely unsurprising.