The fact is that Gutenberg is complicated for customers, and I say this as a developer. I like idea of Gutenberg and this is easy for me, but some clients cannot deal with Gutenberg at all, and studying Gutenberg takes a lot of time with their content managers. Gutenberg's user interface improves with each update, but after each update, I also need to inform my clients what and where they are after the next update, because the customers simply do not understand what happened.