[ricardobeat]

You can make a similar argument for JSX, private properties, etc. The point is that there will always be use cases that see massive improvements from a feature, but that doesn’t mean it’s worth adding it to the language and paying the price in specification and implementation complexity, surface area and learning curve. Especially if it doesn’t enable any new use cases.

If the 5% of people that benefit can get 90% there using userland libraries, the cost of that 10% improvement should not be bore by the other 95%.