Some sort of grid system is needed to manage layouts that flow correctly through all the appropriate breakpoints. I am currently using the grid block offering provided in Toolset and it is fairly full featured.

The default column block is pretty useless as there is no way of easily delineating a gap between the content in each column.

The problem with all this is that important fully featured layout structures are not being provided early enough in the block editor out of the box, something that all plugin vendors can lean on. This means we are getting a mush mash of different optional alternatives and no standard with the block editor.

While I have grown to see the block editor as a good step forward for WordPress, my one criticism from the beginning Is that it falls between two stools in not going all out to be a layout builder.