Swift

Unveiled by Apple in 2014 and led by Chris Lattner, Swift replaced Objective-C as the primary language for iOS and macOS development, introducing a safety-first design that eliminates null pointer exceptions and buffer overflows. It is 30% lighter than the runner-up in syntax complexity, with compile-time checks catching over 80% of common errors before runtime, as measured by Apple's own benchmarks. Compared to #9 Lisp, Swift prioritizes performance and security for modern apps, achieving up to 2x faster execution in compute-heavy tasks due to its LLVM-based optimization, setting a new standard for systems languages.