You clearly work on web applications of moderate scale. For example, Kubernetes and Redis can suddenly become almost necessities for a back end service once it reaches a certain scale.
As one of my side projects, I am running a website with 2M page views per month that has been implemented on Django, deployed to fly.io. Another side-project built-in tenant support, and several independent deployments as well.
Yes, those are moderate scale (for modern hardware), but in my experience very few sites really require "webscale". It is far more common to build prematurely for scalability than the opposite. If you have "webscale" problems, then you also have have a custom platform and team working on those.
The context of this discussion is how to build robust systems as fast as possible. My approach fits surprisingly large number of use cases.