ACF’s creator, Elliot Condon, was one of the more vocal critics of Gutenberg leading up to its inclusion in WordPress 5.0. Developers were concerned about whether or not their custom metaboxes generated by ACF would still be compatible. The ACF team worked to ensure the plugin was integrated into the Gutenberg UI as much as possible and surprised users by announcing an acf_register_block() function that would allow developers to use PHP to create custom blocks.
Early feedback indicates that ACF Blocks has made custom Gutenberg development more approachable for developers who are not as well-versed in React, significantly speeding up the creation of custom blocks.
ACF Pro 5.8 for #WordPress makes Gutenberg block development a breeze! Here's a staff block I made in less than 30 mins. @wp_acf #ACFBlocks #wordpressdeveloper #Gutenberg #reactjs #webdevelopment #webdeveloper pic.twitter.com/VqewoKkcSt
— Sam (@sam_kent_) May 9, 2019
ACF Blocks also launched with a suite of nine ready-to-use bocks available as a plugin from the new acfblocks.com website. These include commonly-requested functionality for client sites, such as testimonial, team, multi-button, star-rating, pricing list, and click-to-tweet, with more on the way.
Source: WP Tavern