Page builder manufacturers are struggling to keep relevant in the Gutenberg era. I also don´t see any good reason why someone would use a page builder next to Gutenberg. Maybe for backwards compatibility with existing sites but in all other cases I would definately recommend not using page builders any more, but only using Gutenberg and lightweight Gutenberg extending plugins with extra blocks. No sense in slowing down your sites with page builder monster plugins any more ... halleluya!