[vacri]

Yes, this is the way regions develop. The grandpappy with everything is us-east-1 (well, historically anyway, which is why it also gets all the outages...), and the services slowly migrate out to other regions from there. You'll see new regions start to pile on services as time goes on.

Often they'll just pop into existence quietly. Our Sydney setup only had two AZs, and a few months ago, I noticed a third one. No idea when that came to life, but it would have been useful a year before :)

[softawre]

Huh. Same with us, got bit by only 2 AZs in Sydney.

By chance did your company just get acquired? :)

[vacri]

Nope. No business-side changes for a year or so...

[querulous]

us-west-2 is usually the first region to get new services, i assume they use it for beta testing

[vacri]

Hrm, fair enough. I thought it was us-east-1, though it seems that recently they're going in a few locations. But definitely, new services appear in the more mature regions first, and then gradually filter out to the others.