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I am talking about it being wide open, not just for AWS, and implementing the ACME protocol.

I think the OP is asking / looking forward big tech like them to host the infrastructure for higher availability. Basically like a mirror. To end users they are just the same server.

On the side note, is the LE infrastructure globally distributed or currently all reside in US/West and/or US/East? Is Mozilla currently the one hosting?

ACM is nice, but it does require the manual step of clicking a link in a verification email.

Yes but it also issues certs for a year, which helps alleviate that email link issue.

If you are running the AWS ACM certificate at the time when the old one is close to expiration it will automatically renew it without user intervention. http://docs.aws.amazon.com/acm/latest/userguide/configure-do...

ACM is kind of limiting though. You can only use it with 4 of AWS's services none of which is ec2 directly which limits use cases I would think.

And then Route53 doesn't support CAA.