Chris Wiegman writes on his blog his reasoning for returning to the WordPress is the new block editor. The block editor, though controversial in the beginning, seems to be winning back the hearts and minds of many WordPress users.
Although GatsbyJs, Hugo, Jekyll are buzzwords for many web developers and migrating their blogs from the WordPress to such more developer friendly static sites. One of the main attractions of these static sites is that they are lean, fast, developer friendly, and more secure from hackers. However, most static site generator frameworks are not as robust as the WordPress, now some developers are returning to the WordPress.