We can stop transpiling to ES5 when a (window youre comfortable with) has elapsed since the last ES5-only browser was released and hopefully your users have upg

We can stop transpiling to ES5 when a (window youre comfortable with) has elapsed since the last ES5-only browser was released and hopefully your users have upgraded. Additionally, you can check the User agents in your access logs (or analytics) to see what fraction od your users are still on ES5 browsers I think once you've correctly configured your CI transpiler, you wont even have to think about it, so it's a small cost, IMO.