Re: EBS Mac?
Understanding EBS performance and cost for your workloads is 2+ hour read just to get started. Then you figure out that snapshots have an immutable EBS type that's not suitable for some uses. OK, so now you have an EBS AMI that's just for booting and it's too small for gp2 so you make it gp3 then buy more IOPS when it's mounted. Now you can add on gp2, gp3, or io2 storage on demand...if the instance supports it. Small gp2 is too slow, big gp3 is slow or expensive, and mind the block size and instance type for io2... Just put that all in a internal documentation on how to fire up a new instance. So it theoretically should be fast now but new instances are all iowait for half the day. Haha, your AMI's snapshot is arriving by dialup modem after the little burst allocation ran out because you didn't buy "Fast Snapshot Restore" for each sub region.
And as always, don't leave anything accidentally running. Turn off "Fast Snapshot Restore" from previous AMIs. Write down the snapshot ID before deleting old AMIs so you can delete the leaked snapshot manually. Oh, delete the CloudWatch logs too because log lines expire, not log streams. Actually, better have somebody manually garbage collect all the stuff that leaks. Just a few more internal documentation pages. Surely everyone reads it.