Worst idea yet. I'm already livid at discovering that in the admin toolbar, when viewing the site, now redirects me to the Customizer when I click "Widgets" instead of the usual Widgets admin panel.

I don't want to go there to customize anything let alone my widgets, so give me the option to CHANGE IT BACK.

If they put Menus in the Customizer and take away admin menus... sheesh, they are trying to drive people back to Drupal, aren't they... and putting everything in Customizer when nothing outside of theme mods works right is beyond stupid.

And no, I cannot see a time where any serious designer, developer or site admin will want to do everything from a mobile device. That way lies madness.

It's been a long time since I've seen an organization actively working to destroy the functionality and usability of it's products. You'd almost think they want to kill off WordPress by slowly driving everyone who works with it away, so they can go do something else.