This nifty article provides examples of using all the post ES2015 features which you hear a lot less about: Here are examples of everything new in ECMAScript 2016, 2017, and 2018
You might be wondering, "What's the support for these features? In fact, what's the support for ES2015 these days?" If you do think that, then don't forget about the Kangax compatability table: ECMAScript 2016+ compatibility table
Or, if you want to know about Node.js support for all of it: Node.js ES2015/ES6, ES2016 and ES2017 support
BTW, if you like the first of those, "optional chaining," and you already use Lodash, it has that feature in its _.get() function.