Gutenberg is so poor and I hate it. But I gave Stackable a try and now Gutenberg becomes usable (if you use only the widgets of Stackable :D and the block classic).

Together with Oxygen and Stackable, both including dynamic content and CTP Support, you are prepared for the future without having to bother with Gutenberg itself.

Stackable has all these features, that Gutenberg is missing (and Gutenberg has a development time of approx. 4 years meanwhile).

Of course Stackable is not perfect and there are missing features, for example you have no Block Gallery. And no CSS Grid and there is more, but I did not dig deeper in this plugin, I will have to work some time with it, to say more at this point.

However, I'm afraid at some point in WordPress you may only be able to work with Gutenberg (the block editor) and possibly the principle/plugin Classic Editor may not work at some point. But then I am well equipped with Stackable.

I don't know if it's been mentioned yet, but you can test the Stackable's premium demo live:

http://demo.wpstackable.com/