In reply to Dovy.

Heck yeah. If breaking changes are the new norm then I'd accept Gutenberg and all it's warts if the minimum required PHP version was updated to v7.0 for v5 of WP. If you don't want to use Gutenberg and/or run an older version of PHP even as recent as v5.6 then you can just stay on WP v4.9 like so many are already planning to do anyhow.