But you might find coming up to date on PHP easier, since you already know an old version of it.
There are many more coders available for PHP than Go. But Go programmers on average are higher in quality because the drudges and blubs don't bother learning new languages.
Recently one of my hosting providers sent me a notice that my account was being transitioned to a new version of PHP. That can't happen with a compiled language like Go, since the none of the language itself goes up on the website, only the executable program binary.
I don't know much about Node.js...