One thing that really sours me in esm is that this is possible (fictional main.js): import Vue from 'vue' import jQuery from 'jquery' global.jQuery

One thing that really sours me in esm is that this is possible (fictional main.js): import Vue from 'vue' import jQuery from 'jquery' global.jQuery = jQuery // to get the next line to work import Bootstrap from 'bootstrap' import 'bootstrap/dist/css/bootstrap.css' Then my head explodes. Why would importing a .css file from my JavaScript ever be a thing supported by any tooling. What is that line trying to communicate? What does it even mean to my current scope? (hint: nothing) import became a giant "do something cool on this line" that maybe the tooling you're using knows how to translate via (say) a webpack loader. For anyone wondering, that line gets translated to the browser dynamically including css on the page.