Roadmap: Boostrap layer system
Hi there,

I think more and more of creating a layer manager like spacemacs. 
The problem is if I do that like spacemacs, there will be on each layer the installation of plugin(s) needed for that layer. So the spacevim users will not have the choice on implementations he wants. Even the plugin manager will be determined.

Spacemacs don't offer that choice and it's fine for me but I can understand that it's not the taste of everybody. It depends on how we see spacevim, is it just a helper to get the spacemacs bindings and fallback on which plugin are install or a complete solution batteries included.

I don't see other solution to get both flexibility and layer system. What's your thoughts on that?

/cc @jimmay5469 @sleexyz @ehamberg @nixmaniack @WuTheFWasThat 
