As soon as anyone asks why they would do that, the answer is obvious. You'd think.
A study on anonymous hiring practices in France showed that anonymization resulted in fewer minority candidates getting hired. Their explanation is essentially that the companies who care enough about diversity to participate in this sort of study are already subtly biased in favor of minority candidates, and anonymization put a stop to it. Considering the amount of focus big tech companies are putting on diversity, there's a fair chance the same thing is happening here too.
Yeah I'd like some more meat to the story as well. Amazon Glacier achieves its pricing by using low-RPM consumer drives plugged into some sort of high-density backplanes; supposedly they are so densely packed that you can only spin up a few drives at once due to power and heat issues. Hence the delay.
I assume Google is doing something similar, maybe with somewhat better power or cooling since they're offering faster retrieval times which implies that perhaps they can spin up a higher percentage of drives at a time.
It's not a terribly serious setback in the history of space flight, but it could be a serious blow to Orbital.
Their whole program is built around the idea of using old surplus Soviet-era rocket engines, originally designed for the ill-fated N1 program. (The N1 program, as a sidenote, is responsible for one of the largest non-nuclear explosions in human history when one of its launch vehicles had a failure shortly after takeoff. On top of a zero-for-four launch record, it's not the program I'd pick to emulate.)
My understanding of the Soviet engines is that they have some design features that make them lightweight for their output, but represent tradeoffs not typically taken on Western engines, due to the risk of "burn through". But some people--perhaps including Orbital--thought that the designers had solved the problem and the risks were overstated.
Too early to tell right now, but if the engines turn out to have a fatal flaw, that would be bad for Orbital. It'd probably be good for SpaceX, since they're the obvious alternative, but it'd leave NASA down one contractor for the commercial launch program.