True, but with any managed service, hidden limits and a cloud provider's own engineering (or lack thereof) may come back to bite the top 0.1% (the whales).

One approach to solve problems of scale is to trim down scale and bound it across multiple disparate silos that do not absolutely interact with each other at all, under any circumstances, except for making quick, constant-time, scale-independent decisions, may be.

In short, do things that don't need scale.