The HotSpot JVM, V8, LuaJIT and probably a few other such projects have become wickedly fast over the years, and using native languages because they're "faster"

The HotSpot JVM, V8, LuaJIT and probably a few other such projects have become wickedly fast over the years, and using native languages because they're "faster" is folly. What Rust, C, C++ and the like actually give you is control. It is up to you, as a developer, to leverage that control to get better performance. Control also gives you nearly limitless rope to hang yourself with.