Variables and Components - Separate libraries v. '1 library to rule them all'

Let’s discuss ‘best-practices’ and some anecdotal examples/experience in managing Design System libraries. Specifically the relationship between component and variables. 

Questions:

For your main/core component library, do you also publishes the main/core variables in the same library? 

OR

Do you have a dedicated Library for the components, and a separate, dedicate library for your variables? 


List suspected/experienced pros/cons.