A website today receives a large chunk of its traffic from evergreen browsers — most of which have good support for ES6+, new JavaScript standards, new web platform APIs and CSS attributes. However, legacy browsers still need to be supported for the near future — their usage share is large enough not to be ignored, depending on your user base
Gutenberg is more than an editor. While the editor is the focus right now, the project will ultimately impact the entire publishing experience including customization (the next focus area). Imagine a custom “employee” block that a client can drag to an About page to automatically display a picture, name, and bio. A whole universe of plugins that all extend WordPress in the same way. Simplified menus and widgets.
