In reply to Sonja London.

I have both Gutenberg and the Classic Editor plugins installed and active. I have it set to Gutenberg as the default editor, but giving me the ability to switch to the classic editor if I feel the need to. I don't know how common my use-case is, but I am a statistic (being a Jetpack .org user) where having the classic editor plugin installed does not mean Gutenberg is disabled.