Serverless as a term mixed up with FaaS. In 2022, Serverless is more general as it can be defined anything that autoscales to infinity and scales to zero when not used and pay per use. Amazon DynamoDB is also serverless in that sense for example.
> anything that autoscales to infinity and scales to zero when not used and pay per use
Ah, you mean grid/utility computing. But as you point out that's broader than FaaS.