I know this issue has been reported several time but #448 where we are supposed to get updates looks to be dead

I have been fighting with uglify and node during some time to uglify some es6 code, while uglify was throwing like #3275, thinking this was due to my old global installed node version not supporting ES6, just to discover at the end after resinstalling everything properly that uglify does not support ES6 (!!!), quite surprising...

Do you have plans to support it?