In reply to cinza.

I definitely agree that the Columns block needs some sort of controls for adapting to screen size. The layout you describe would require registering a custom block style at the moment if meant to be optional and not the default (just custom CSS for that). Not impossible for a developer to build, but users are out of luck if their theme author doesn't add it in. Or, they have to find a third-party plugin.

I just disagree that all layout types need to be supported in a beta release or that related options need to be rushed. Make the wrong decision and you create legacy baggage that you're supporting for years. It's OK to let third-party developers extend the platform with a wider range of tools first. So many of WordPress's greatest features were done years ahead of landing in core and were refined over and over.

On that note, I highly recommend the Layout Grid Block if you want tighter control over column-based layouts.