Thanks to Toby Cryns for alerting me to this important update to WordPress. Unfortunately, not all updates are well received (2.5 out of 5 stars currently), and since Gutenberg is going to dramatically change the user interface, you may want to look into this before it’s too late. This is happening whether you like it or not, a la Windows 8 (remember the fun (:-?> of the new tiled interface?)
Details on this update are available in this article from Small Business Trends. Do NOT allow Gutenberg to go live until you read this because it may break your site. Test first! This is NOT a minor change. Once you migrate to the new layout, you cannot uninstall it, you would have to restore your original site from backups.
For now, installing the Classic Editor WordPress Plugin will keep everything as it is – for now. I took a chance and set the Classic Editor on a couple of my sites, but took the Gutenberg upgrade on a third, and then went in to play with it. Frankly, it’s not that hard or scary, but still – you may want to set up a test site and play with this a while first.
Here’s the latest video tutorial.