Musk's idea of free speech will be pretty clearly determined by whether or not he will unban Trump's account on Twitter. That account's posting history is so expansive and comprehensive in terms of what free speech can be interpreted as.
And there it is:
Twitter's decision to ban the former US president was "morally wrong and flat-out stupid", Mr Musk told the Financial Times Future of the Car summit.
Now we know what we needed to know.