We do it for just about 100% of the time now. Only two exceptions: 1.) We have a second project we are ramping down on that only myself and 1 of my devs is trained on, so when we have to do anything with that he breaks off to do so. 2.) When bugs creep up that I can quickly solve, I'll do so as to allow my team to remain focused on our current system wide rewrite. Other then that, we do everything as a team.