Gregory's Server@philipwalton Very interesting investigation!
What I feel like I'm missing is how many users are in practice still using browsers without ES2015+ support.
I know @ljharb knows about similar Node.js data, maybe they also know about browser usage?
I otherwise completely agree that the state where websites think they support ES5 browsers but don't is a problem.
@jfmengels @ljharb according to caniuse (which is based on Statcounter data), it's 97% of users: https://caniuse.com/es6
Personally, I'm skeptical of the accuracy of Statcounter data, but regardless I still maintain that browser support is something that sites should be deciding for themselves based on their own data—not based on somebody else's data that may or may not be representative of their user base.