The time it takes to integrate ( and switch) many of these services may not be much less than spinning up something comparable yourself between docker, k8, lxc containers, etc.

Prematurely building scaling into every single layer of a test project might be a bit much, especially when it might not be known where the bottlenecks may occur.

In many cases, early prototypes/mvps should be semi throwaway anyways.

The idea of having a turnkey stack like this, maybe even with a script remains intriguing tho :)