Emmet Connolly (who brought OOUX training to Intercom back in 2016) write about how design systems need to be object-oriented, and how they are working toward that goal at Intercom.
Emmet Connolly is an advocate of the "full-stack design system", basically a design system that is rooted in a clear, shared conceptual model. "You shortcut a lot of extra thinking once you start with, “What does this object need to be?”' AGREED. In a hurry? Skip to min 9 to cut to the chase.