> What if your plan ID becomes unavailble

The API should throw an error, so I can adjust my scripts, instead of silently provisioning a server I never intended to provision.

There should be a deprecation process when a plan is discontinued, so this doesn't happen unexpectedly.

If AWS can't provision me a t1.micro, they don't just go and give me a m3.small instead.

Deprecated plan ID requests should return two plan ids (new_price <= old_price and new_specs >= old_specs). Then a bit of retry logic means the code will still function sanely until the hard coded ID can be updated (or it may continue to function indefinitely).