[marlonicus]

> "20% of your customers" Depends on the product.

Regardless, you can easily transpile a codebase to support those browsers.

If you aren't doing that already, you probably should be. Otherwise you're supporting a codebase that is quickly going to become very dated and (in comparison to a more modern codebase) much messier.

[sametmax]

Yeah but this is not the purpose of the article. The article suggest you don't need to and can use the feature right away. Otherwise it would mentions even mention await, async, yield, etc. and say you can use it too.