I Do Not Know What Any Of These Enhancements Mean

I saw there was an update available for Dreamweaver:

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so I clicked the little "What's New?" hyperlink. I saw this:

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I have zero idea if these are changes I need or not.

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CEF updates - Dreamweaver now integrates with the latest version of Chromium Embedded Framework, so designers and developers can build HTML5-compliant website and display Flexbox elements, CSS grids, and much more.

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Okay, I can do this stuff. Why do I want to do that stuff?

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ES6 support - New EcmaScript 6 support includes quick-type listing of classes, methods, arrow functions, and generator functions, as well as linting of ES6 code so you can work with the latest JavaScript updates.

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I don't get it.

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JavaScript refactoring - Use rename and refactor features to intelligently organize your JavaScript code.

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This one I actually can see some value, but I don't code enough JavaScript to make it worth the time to update the software.