I want to create sites for clients using Gutenberg. But when I start a specification process for a big site, for an organisation with 30+ employees where the editors will undoubtedly be the most junior an inexperienced ... I am in total fear of letting them loose with this rather unstable and weird system.

I know this will be deeply unpopular but I notice that most of the Gutenberg cheerleaders are only running really simple blog type sites. It's very rare that I follow a project contributor and see they've struggled with the same massive monster projects as I encounter at work.

It's fine to use Gutenberg on a blog with a couple of additional pages. As soon as we start to look at sites with 5 CPTs, custom layouts, bespoke blocks, additions to allow layout switching, capabilities for templates. It all starts to fall apart really very quickly.

Gutenberg still seems like a tool to edit blogs about making Gutenberg.