I’ll give you an simple advice:
When 5.0 comes out, wait with updating till at least the first bugfix is released, then install Classic Editor plugin and move on. In three years time check the status of Gutenberg (I’m sure it’ll be much better) and then decide whether you get on board or whether you look for another CMS. It’s that simple.
And now go read a book or play with children and stop reading about Gutenberg. You’ll be better off. Trust me.
Gutenberg undermines both those, so now is an even better time to try out a Bolt/Grav/Statamic/etc.
I hear your complaints, but WordPress is still the best tool for marketers and companies. What we need is something that combines the benefits of WordPress with the benefits of static sites.
Maybe something like Strattic: https://www.strattic.com :)