I've had some success with setting `display: contents` on grid children to avoid having to flatten everything. More detail here: https://css-tricks.com/get-read

I've had some success with setting `display: contents` on grid children to avoid having to flatten everything. More detail here: https://css-tricks.com/get-ready-for-display-contents/ https://css-tricks.com/get-ready-for-display-contents/ It's not a substitute for subgrids, but it does help in some situations.