Is IE11 still required?

I see there is a approved theme which use CSS Grid Layout which is not supported in IE11.

So, that means that browser IE is not required any more?

I still have customers that IE11 is the main browser of their users… so yeah.

I agree with that. But was wondering how they approve (allows) templates like this if the IE is still required.

Any news regarding the use of CSS GRID for building Themeforest WordPress themes please?