The 1st beta of WordPress 5.0 was released today (which includes Gutenberg). Outside of discovering any major blockers, the current plan is to release 5.0 on November 19.
3.5 weeks feels awfully short to go from beta to production on a change so big. Isn't Gutenberg going to be the new default, no opt-out? Kind of makes me nervous.
You can still opt-out by installing the Classic Editor plugin[1]. That will disable Gutenberg and let you keep the current experience.
There's also this plugin which removes all other references to Gutenberg so if you're building sites for clients they aren't able to accidentally switch the classic editor off, and don't get nag screens about trying Gutenberg. https://wordpress.org/plugins/classic-editor-addon/
Beautiful! Also, that makes perfect sense. Thank you for the link!
There's been a stand alone plugin activating the Gutenberg editor out for ages now. You can install it and test how things work right now in 4.9.8 or whatever version you're running.
So this 3.5 weeks thing is a bit of a distraction.