mjgardner, #ECMAScript 2023 (its friends still call it #JavaScript) will standardize allowing #Unix-style shebang lines to indicate a #CommandLine interpreter.
https://github.com/tc39/proposal-hashbang/blob/gh-pages/README.md#why-hashbang-instead-of-shebang
Of course, the JavaScript kiddies want to call them “hashbangs” because “hash is commonly associated with modern terms involving # such as #hashtag.” No respect for tradition 🧓🏻