> Fast -- in what way? How can you even measure the speed of an environment?.. How fast it installs, how fast it's ready when needed. This can be relevant depe

> Fast -- in what way? How can you even measure the speed of an environment?.. How fast it installs, how fast it's ready when needed. This can be relevant depending on how you use them. For example, if I let every script run in a separate environment, it would matter if it's ready in 10 seconds or 10 milliseconds. > Declarative -- as a developer, I don't care... Why is this important? Also, declarative means there's a bunch of imperative code hiding behind it. It just makes it harder to debug when things break. As a developer, I do care how much work something will offload on me. And declarative is more about the state of the world, than the execution of a process. If there is a trustable system which can manage that world for me, then I will have less work, and fewer problems.