I'm not sure scripting-language interop is holding back Swift, but ... > call a swift compiled extension from Python/JS/Ruby/PHP The story there is excellent.

I'm not sure scripting-language interop is holding back Swift, but ... > call a swift compiled extension from Python/JS/Ruby/PHP The story there is excellent. Here's a Swift function callable from C @cdecl("myfunc") public static func f(){...} C/C++ types are mostly handled automatically (including sharing memory management), but it can be tricky. To build a library to load and call from any language: swiftc mine.swift -emit-library -o libmine.dylib E.g., calling from java 22 FFI: https://foojay.io/today/java-panama-polyglot-swift-part-2/ https://foojay.io/today/java-panama-polyglot-swift-part-2/ But most people instead use a slower json server network interface because (sadly) json is the lingua franca for scripting and Swift Codable makes it trivial to map the json to a swift type.