> Enums is going to make your TypeScript code not work in a future where TypeScript code can be run with Node.js

Apparently they're planning on adding a tsconfig option to disallow these Node-incompatible features as well [1].

Using this limited subset of TS also allows your code to compile with Bloomberg's ts-blank-space, which literally just replaces type declarations with whitespace [2].

[1] https://github.com/microsoft/TypeScript/issues/59601

[2] https://bloomberg.github.io/ts-blank-space/