Under Maris, GV has had some high-profile misses — most notably, the disastrous app Secret. But those were outweighed by early bets in gigantic startups like Uber, Nest, Slack and Jet.com, which just went to Walmart for $3 billion. Lately, GV has upped its investment in startups working on health and biotech, a strong interest of Maris's. While the...