"...it will be interesting to see what the reactions are from users who experience it for the first time."

We already know the answer: it has been the worst possible. For the average user, writing in the new editor has been impossible; it has fewer features in writing and is not intuitive.

As some one said (https://www.dedoimedo.com/computers/wordpress-gutenberg.html):

"Gutenberg is most likely an almost knee-jerk response to the threat of the mobile adversaries and a few other competitors that offer simplified backend interfaces. However, the paradox in this solution is that it alienates almost its entire user base of mostly diehard professionals who create websites, and in their place, it attracts the rabble of casual 'bloggers' who just wanna show the world how inspired and empowered they are."