the “babel-preset-es2015” package. This package allows twenty-something web developers to write a newer, worse version of JavaScript that no one else on their team knows.
I Peeked Into My Node_Modules Directory And You Won’t Believe What Happened Next
Jordan Scales

Love it. Thought that I was the only one annoyed with syntax changes to something that worked perfectly well. (I know there’s also good stuff in ES2015, but could have done without *syntax* changes!)