As a PHP dev (8 years), I can honestly say PHP is an ugly language. But it gets the job done. And I'd say with 10K hours under your belt, you can do what you da

As a PHP dev (8 years), I can honestly say PHP is an ugly language. But it gets the job done. And I'd say with 10K hours under your belt, you can do what you damn well please. Feel like spending another 10K hours in PHP? Go for it. Wanna learn C or Rust or Scala or Python or Ruby? Knock yourself out. I personally am a fan of diversity (master one skill set, then another, then another). Unless you're doing cutting-edge work, you're probably at that point where your diminishing returns are close to zero, so you might as well learn something new.