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1. You can define enum like `const enum A {...}` and they will not have runtime representation.

Correct, but that does not solve the other issues I pointed.

Additionally, const enums DO NOT have an associated type. That is a problem in libraries, since users cannot reuse the type definition around (it back ports to a string or a number)

const enum doesn't work when in transpileOnly mode (e.g. webpack, Parcel), and Babel treats "const enum" the same as "enum". I'd really love a non-broken const enum in TypeScript, though.

I'd love to see them out of the language. I do not have evidence/document supporting this, but I think it was ultimately a failed attempt of copying the C# feature ignoring the fact that JavaScript works differently.

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