At that level, you can just switch to the clang compiler based Swift language, which is much nicer/modern. And look, there are already Swift web frameworks like https://vapor.codes
Swift is an entirely new language, more like Rust or Kotlin. It's also not based on the clang compiler, clang is a C/Objective-C/C++ front end for LLVM.
As to "nicer/modern", well...it does clean up some of the effects of having a hybrid (syntax duplication). Other than that, it is in many ways a step back towards C++ style languages, static/brittle, incredibly complex and incredibly slow to compile.