I’ve been taking a look at the new WP Engine Headless framework.
I recorded an overview in case you are curious:
I don’t have a strong opinion about it, to be honest. By this first look, it looks to me like a nice abstraction of the WP data management required to make a theme with NextJS.
My only wonder is if they have plans of adding a more complex plugin/extensibility system, or they only want to provide an abstraction of the WP data for NextJS applications.