[manigandham]

Those are just managed services, as in managed versions of I/P/F/S-aaS.

"Serverless" can be applied to every SaaS product ever made and is just an all-around meaningless and dumb-sounding term.

[dastbe]

(aws employee)

The distinction I've heard and make (regardless of serverless being the right term) is that these infrastructure services expose their control plane and data plane without tying you to the concept of a particular machine. Compare this to all publicly available forms of RDS where I still have to think in terms of machines for scaling and management.