[Klathmon]

Neither is object spread, but yeah I've stopped worrying about those labels. For the most part people treat "ES6" as "all new JS features", and that's not going to go away soon.

Though when I see ES2015, I tend to take it literally.

But moving forward it's going to be important to see what version of the language people are using in their libraries. I can already see github badges for "ES2015 only" or "ES2016+" or something.

Or maybe a plugin which will scan the sources you import into your project and give you warnings if a library is using a feature you aren't supporting/transpiling...