Ashtang yoga has changed my life, some people say here.
I think this is easily possible. If someone gets up an hour earlier in order to do Ashtanga yoga life has changed already. That is not big thing. Life changes all the time.
I have not yet heard that somebody has said: Ashtanga yoga has changed me.
And that is true, because something is missing: AWARENESS.
With awareness much more than only life would change.