Where you see 'vendor lock-in', I see the opportunity to leverage somebody else's engineering talent to solve commodity problems that our customers don't pay for.
Bandwidth available for EBS volumes varies. For instance, with EBS-optimized volumes it can be 500Mbps, 1Gbps, 2Gbps, or 10Gbps, depending on the instance type, as shown in this chart from an Amazon presentation:
The "NA" of the 8xlarge instance types is because there's no ebs-optimization as an optional feature on that instance type; you automatically get access to 10Gbps.
