He used to work 90-hour weeks and lost ‘years’ of his life. Now the US Polo Assn. CEO clocks off at 5:30 p.m. and won’t text his team on weekends

The U.S. Polo Assn. boss isn't the only CEO with boundaries: Netflix's cofounder kept a 5 p.m. Tuesday cutoff, while JPMorgan's Jamie Dimon takes all his PTO.