WordPress Gutenberg Breaks CKEditor Setup

I have CKEditor installed and much prefer it.  Upon attempting to write a new entry today I found post-new.php yielded just a blank page.  Then through my mental fog came the realization that WordPress has been threatening to cut in Project Gutenberg recently.  Additionally I realized that CKEditor plugin often conflicts with other plugins.  So upon disabling it I saw the new interface.  Ok no thanks.  I googled and found the following officially supported WordPress plugin.

• Classic Editor

I was a little surprised that WordPress must be automatically updating my php scripts because I run on my own servers.  The update process is detailed here:

• WordPress: Configuring Automatic Background Updates