I guess were in luck then. Apple recently released the Safari Technology Preview version of Safari.[0]. And if you open the ES6 support page in the post you re

I guess were in luck then. Apple recently released the Safari Technology Preview version of Safari.[0]. And if you open the ES6 support page in the post you replied to it shows support for 98% of the features. Supposedly the STP version is getting updated every 2 weeks, so lets hope that that also transitions to the non-developer version of Safari. [0] https://developer.apple.com/safari/technology-preview/ https://developer.apple.com/safari/technology-preview/