It's unfortunate the decision was made to force Gutenberg as the new default editor and create resistance, instead of rolling it out over time with smarter marketing, and giving more time for adoption and thus improving it from user feedback to build greater support, and give more time for developers also. On a similar front, I wanted to be able to more easily use one editor or the other depending on a site or client site's needs, and I feel it really needed to allow users to "try it out" for some new posts but not for others. With those in mind I created a plugin that gives a wide range of options, plus add a button to switch between the editors, an approach it seems every page builder (except Gutenberg!) has recognized as fundamental... Guten Free Options I hope it both helps some people give Gutenberg a chance and thus more feedback to improve - if and when they find the desire to - while keeping their existing site setup unaffected.