What is the problem you are trying to solve?
Actually, a Container fragments can be set as “Flex” and in this way is possible to set many other css flex features like flex-wrap, align-items and so on.
It miss the “gap” feature that is quite always useful to improve layouts. Margins on specific items is a workaround not so optimized especially in responsive mode.
What is your project about? (e. g. Intranet, Partner Portal, Enterprise Website, etc)
All
What is your proposed solution? (optional)
Simply add anothe possible configuration for “flex containers”, called as GAP