It’s a complicated, precarious, exhilarating, fascinating and unprecedented journey on which the NBA officially has embarked. Bumps along the way are all but guaranteed, but the time, cost and effort invested so far — and what the league considers its prospects for success — makes the departure worthwhile. “We believe we’ve developed a safe and responsible plan to restart the season,” Silver said. “We ultimately believe it will be safer on our campus than outside of it. But this is definitely not business as usual.”