Comment by aslom

The main point of serverless is cost - it is not just "Reduced operational cost" but orders of magnitude difference if one were to build cloud solutions that can scale the the same level and pay for cloud infrastructure (even if not used at minimum something must be running ...), monitoring, and people effort involved on ongoing basis (real cost)

Compare to working with level of abstraction of "entity" (function, could be bigger) and have it running when needed and scale as needed.