The community members are discussing the possibility of a fluid grid layout in Webstudio. Some community members mention a specific library called "fluid-grid.com" and Squarespace's proprietary layout model, but the Webstudio team states they won't be adding a custom layout algorithm to the core anytime soon. However, they note that Webstudio will eventually have CSS Grid in the UI, which can be useful for layouts along with CSS Flexbox.
Not the same by any means (no drag-and-drop, most likely and you'd need to learn about CSS-grid), but Webstudio's eventually going to have CSS-grid in the UI. Useful for layouts along with CSS flexbox https://github.com/webstudio-is/webstudio/issues/3057
