In reply to Tom.
Agreed. When I tried to point this out I was met with “well, just don’t update.” Core seems to not understand the full scope of their user base and that there is a sizable audience of users who have to have stability over “new shiny”. If WordPress officially supported an LTS branch, then this would be an acceptable answer. But considering the only branch that is officially supported, and considering that security updates are often mixed in with both minor and major update releases, the only way to ensure your site is not vulnerable (in terms of issues in core) is to always update to the latest version.

I understand that they want to rapidly iterate the components related to Gutenberg but then just lends support to keeping Gutenberg as a plugin and not incorporated into core.