I'm surprised this post didn't mention the ui components (front end code in whatever framework they use) in the system. in my experience, a design system thag only caters to designers will get little adoption, particular in larger organizations that could benefit from having a system in place.

in my experience the designers built a sophisticated system they used to streamline the design process across teams and projects, but it felt short during handoff with those teams that didn't have the resources to build new components.