I doubt it's ever coming but to really separate layout from content requires the layout tree and the content to be separate trees. Right now there's effectively only 1 tree, the DOM and CSS for the most part is just meta data on that tree.
GRID requires things to actually fit a grid. If your grid isn't easily divided you add nested grids. But once you nest grids you can no longer seperate layout from content since the nested grid tree (layout) and the DOM tree (content) are tied together.
GRID requires things to actually fit a grid. If your grid isn't easily divided you add nested grids. But once you nest grids you can no longer seperate layout from content since the nested grid tree (layout) and the DOM tree (content) are tied together.