In reply to Drew.

Well... yes, in theory.
However, at the moment Gutenbergs Columns Block is very nearly unusable in any real-life situation, IMHO, unless you enjoy frequent mails and/or phone calls from irate and understandably frustrated clients.

Usability for simple pagebuilding tasks is simply miles away from what any pagebuilder I've ever tested offers.

As much as I dislike the unholy mess of shortcodes and metadata that these plugins use and even worse sometimes leave behind after disabling, Gutenberg is not yet able to step in, unfortunately.