I do appreciate the modern features a lot personally, and the fact they have been added without breaking the world. Interpolation, spreading, map and arrow functions are a huge usability boon. Plus I'm glad I can use classes and forget that prototypes ever existed.

But I train beginners in JS and boy do I have to keep them in check. You blink and they shoot their foot, give the pieces to a dog that bite them then give them rabbies.