Ghost reached it's 1.0.0 milestone at the end of July. Ghost 1.0.0 is a major overhaul with an impressive list of features. Defaulting to MySQL, a new editor, and theme API changes were among the changes that stood out to me, as documented on their developer blog. This was a huge effort. Congratulations to the Ghost team.
After this release it's likely that many people will make comparisons to Ghost when they're evaluating Gutenberg.
I have to admit, I love sneaking a little Ghost news into a WordPress newsletter every now and then.