This has been discussed before, but i still want to make a post about it.
We currently have a design system that uses fractions to define the logic of our grid-system. It already helps defining the structure of a grid before passing it by development and also closes the gap between design and development. Only problem is that we have to document and define the grid system for each device size, which takes more time to design and takes longer to create a developer hand-over or problems when showing stakeholders the scalability of our prototype. while we just want the grid to scale evenly across viewports unless defined otherwise.
I would just love to create an auto layout based on fractions (fr) to just state the responsive behaviour of a grid layout.
For now we will do it the old way, but i wanted to share my story and hope this could happen in the future 