Former Starbucks CEO’s viral post explains why he doesn’t work after 6 p.m.

Starbucks recently announced a leadership change: Brian Niccol will replace Laxman Narasimhan as chairman and CEO. Niccol, the current head of Chipotle Mexican Grill, will officially begin his new role on September 9. Until then, Starbucks’ CFO Rachel Ruggeri will…