Yep I know, I'm specifically complaining about the current trend of casting off old ajax methods/libraries and moving to 'fetch()' polyfills, as currently the 2 main popular fetch modules both recommend 'es6-promise' as polyfill which has serious problems in this regard: https://github.com/matthew-andrews/isomorphic-fetch/issues/1...

Technically however, what that polyfill is doing is 'on-spec'. Note that your `process.on('unhandledRejection')` thing is clearly outside spec as `process` is a Node thing, not a JS thing.