This is also true for individual components btw. I design 99% of what I do to fit within one design system (https://www.figma.com/file/1bvslVfr7akG1C6Qo8dgWK?type=design). So from my perspective it looks very silly if Highlighter, Yondar, Nostrocket, Satlantis, etc... all build out their own less polished and less feature-rich version of an extremely similar Group Chat UI (to name the perfect example).