Every post here comes from a rule in the product, and every rule came from a failure on a real AWS account. No listicles, no predictions — just what happened, what the evidence looked like, and what the fix cost.
A tier that reported healthy autoscaling for years and could not scale at all. Neither resource looked wrong on its own — only the join between them did.
Exactly which AWS API calls a monitoring vendor can make with a read-only role, what that does and does not expose, and how to verify it yourself before you deploy anything.
Idle Elastic IPs bill by the hour, and since 2024 so do the ones you are using. Here is what it actually costs, how to find yours in one command, and why the advice you will find elsewhere is out of date.