> Normally I wouldn't doubt it but in this sort of situation

Then you're very misinformed.

As a cloud administrator, I see resource availability and account limits on a weekly basis going back years.

I tell people:

- to pre-provision at least some extra servers rather than wait for an autoscaling operation to fail.

- that new instance types often are rolled out gradually, and lead time is often 1 month in AWS

- that killing a 1000-node cluster then expecting to immediately rebuild it often doesn't work.

- for DR and BCP planning, each region (or AZ) should be able to handle enough load at all times in case one region (or AZ) is unavailable. I've never seen anybody do that, even after I told them, because cost.