All our existing clients will stay with Classic Editor on 4.9 branch or with the plugin, the learning curve for Gutenberg would be too steep for most, who often don’t know anything at all about computers, they just follow their years long same same steps written on a piece of paper to publish a new post or change their weekly menu page or similar. They have no need to change anything, and mostly no budget either.

For new new clients we tried to consider Gutenberg since a few months, but as it still is far from ready, each test results in most obvious bugs and editor still feels way too slow in browser until today, we can not recommend Gutenberg for now as well. Maybe we will reconsider this mid 2019, not sure yet though.

So currently also new projects are done with Classic Editor, and will stay in WordPress 4.9 branch for a while, to allow easy migration to Classic Press or similar, if the Gutenberg ship won’t float as expected…