[brightstep]

In some cases you can use it to define string arguments to an external library. Maybe table names to an ORM or a well-known file path. This helps because you get autocomplete from typing `MyEnum.` and seeing options, even though the external function takes a plain string.

[afavour]

All of that is possible with a string literal union though, surely?

[brightstep]

It's not possible to get the autocomplete unless the function/method you're calling takes a union. Many libraries can't do that because they need to be flexible in what they receive. So yeah, you can define a union, but editors don't have the context to know your union applies to the call.