[koollman]

Well, it is about things to prepare before being in this situation, I acknowledged already that it was unhelpful now, since it is too late. It is advice for other business deciders looking at this, or for this one for changes to implement in the future.

Sometimes the plan is "well, this business had a good run, now it is over".

Sometimes it can be as cheap as "well, here's the documentation to run all my stuff elsewhere, starting from my external backups"

Depends on how much money you lose from a failure and how likely the failure is. As an additional point, you may not plan for s3 going down, but even a price hike on egress traffic may put a business in trouble if trying to move without already having external backups. So, as often, you have to do some cost/risk analysis. But having backups not controlled by your main provider is often considered a good idea.

Technical problems, human error, cost changes, various disagreements between provider and customer, can all be made easier if you have a plan B rather than being stuck with a single provider or solution