I'm a bit confused, wouldn't that still just be block gap just in a horizontal container? There's never both a horizontal and vertical gap at the same time at a container level, so discriminating doesn't seem to make a lot of sense?

That could work, but I don't think we have a way to set different block gaps in each container do we?

The other benefit of the approach I suggest is that we would only need to set it in one place rather than for every container.

That could work, but I don't think we have a way to set different block gaps in each container do we?

#33991 this should solve it.

From the theme.json perspective, it's already possible to define different gaps for different block types.

What we need to do as well is to refactor the existing horizontal blocks to use the "flex" layout that way they don't get polluted with CSS that is not targeted for them. (buttons, social links, navigation, columns)