The problem is, what to do when your account hits the limit? The subtle point about EC2 is you can’t actually shut down servers and have them come back up later unless you have a specific configuration - which not everybody has, so you can’t simply power off systems and not destroy something. Not insurmountable, but not trivial either. You also can’t say that there’s a limit except for an incompatible subset of products, nor can you ask users to be okay with randomly destroying things - the mere rumor of that destroys user trust in something. (Who’s still shy about using EBS despite the last major incident being back in… 2016? Also that outage was limited to one region.)