When using serverless, you are paying more for the devops and other simplifications. Eventually the costs can outway the benefits, have seen this many times. Serverless has its place, but it is not going to usurp cloud computing norms.

I'd also say things like Neon "serverless postgres" is not really serverless. It is using serverless as the de jour marketing term for managed postgres SaaS. I can get the same thing from GCP (Cloud SQL) for much less