What can we learn from Modern Drupal Layout system?

At Midcamp I did a presentation that did a detailed comparison of how Layout Builder in modern Drupal compares to the layout system in Backdrop CMS. From this I learned some interesting lessons that I hope can be applied to the Backdrop CMS layout system.  I'll use this session to briefly review the lessons I learned and share my proposals. Looking for a discussion about how to improve the Layout system in Backdrop, based upon what we can learn from Drupal Layout Builder.

I expect that participants in this discussion will gain a better understanding of how the Layout system in Backdrop CMS works in comparison to that in Modern Drupal and discuss ideas for how to make it better in Backdrop (and maybe also make it better in Drupal).

Specifically, I would like to discuss this proposal: https://github.com/backdrop/backdrop-issues/issues/6434

Links coming...