Reserved words are introduced into languages over time. This is how languages evolve and hardly Python-specific. (Example: Rust added async/await keywords relat

Reserved words are introduced into languages over time. This is how languages evolve and hardly Python-specific. (Example: Rust added async/await keywords relatively recently.) You either stick with an old version or deal with it. gp specifically links to a SO question discussing asyncio.async breakage, which would be considered API breaking except it was specifically provisional.