A community-driven Emacs distribution - The best editor is neither Emacs nor Vim, it's Emacs *and* Vim!
I want to move to org for todo-lists, which is why I'm using mu4e. The layer unfortunately is very bare. Even SPC still does confusing things.
Anyway lets rephrase the question: how to load an additional package such as mu4e-contrib in .spacemacs only when needed/used.