The fact that ES2015 was not backward compatible opened the Pandora's box to the plethora of build-system-only libs. Now the browser and your application are to

The fact that ES2015 was not backward compatible opened the Pandora's box to the plethora of build-system-only libs. Now the browser and your application are too distant. Exposes the dev to a world of tooling but increases friction on building, points of failure and complexity. Recently we are trying to fit them again and this post is a useful guide to do it