Sure the cult always think they're right and others' opinions are rubbish. How about:

- Not a front-end editor Why not? Good luck to all the devs who have to create multiple stylesheets (one for backend, one for frontend) and deal with all the quirks of all the inline embedded UI elements of Gutenberg inserted into the DOM.
After wasting countless devs hours styling for the backend, all you will ever get is what's close to frontend. It will never be true WYSIWYG. Oh and it's going to be quirky and can break editing randomly.

- Missing basic features bloggers are used to Colors! Yes, you can't color headings something most bloggers in feminine niches always do. You can't change color of a word mid-paragraph - again something very commonly done right now.

Image galleries don't have choice of selecting image sizes or even adding proper srcset + sizes, and waste un-necessary bandwidth downloading large images - something that old galleries system did without any issues.

- Still quirky. Using it for 6 months and it still breaks too often. It's at beta mode at best.

It does have a lot of potential but to be arrogant enough to say it's ready without understanding massive number of users, that's just stupid.