They don't nurture any new tricks long enough to actually prove it out. Their product graveyard is like the SV equivalent to the city of Colma. From Wikipedia: "With most of Colma's land dedicated to cemeteries, the population of the dead—not specifically known but speculated to be around 1.5 million—outnumbers that of the living by a ratio of nearly a thousand to one. This has led to Colma being called "the City of the Silent" and has given rise to a humorous motto, formerly featured on the city's website: "It's great to be alive in Colma""