My impressions of the classic editor and the new editor. They seem to be booth usable and still have issues. I my decision is a matter of preference.
The classic editor although usable feels old (web 2.0) in ways. Seems like a simple text editor just like we use on our school site Canvas. You only have one control panel on the top. Though still usable not as customizable withing the site. You can add images, lists and links.
Gutenberg gives you more customization of your posts. You have custom control panel for each block depending on the type of block you use. You also have more options like tables. Classic editor doesn’t have it as an option. Maybe you can get a plugin to add this functionality. Rearranging images is also a breeze compared to the clunky image controls of the classic.
While Gutenberg is not quite fully features like desktop publisher it does most of the job you need and It is the my choice for editing WordPress.