I haven't opened Xcode to do any work since November. If that was required to do my best possible work then I would do it, but I am doing better work than is possible when I do it so I do not do it. That is why I am not twisting myself into knots about what skills I am losing versus gaining. If I am losing skills then it is because they are not necessary to do my best possible work. The skills I am gaining are required to do my best possible work. I have never been precious about this.