Just because they make Multi Factor authentication free for global admins doesn't mean everyone turns it on, and MFA has had some found vulnerabilities.
If everyone did the correct implementation of privileged user roles.
I have read many articles that suggest the whole representational state transfer API (RestAPI) is the new wild west!
Serverless adds an additional dimension where logging and test are made significantly more difficult.
The
https://cloudsecurityalliance.org/ folks complain about this serverless thing a lot due to log and test.
Someone, I'm thinking State Sponsored Hackers may have already found the holes.