It feels like the end of the chapter in Silicon Valley.

A few new things have become hits, e.g. dockless scooters. But I can't help noticing all the "end of an era"-type M&A that's going on. The effect is particularly strong in social networking; we're collectively coming to terms with the fact that, though embroiled in controversy, facebook has no credible challenger. They've won.

• Kleiner Perkins is splitting in half
• Airware: $118 million raised, closing their doors
• Path is donezo
• Never-ending controversy finally did Theranos in
• uBeam's CEO has stepped down
• Social Capital is melting down
• Pandora finally gave up trying to be a standalone company, and sold to Sirius
• Apple acquired Shazam
• Snap isn't sure whether they'll survive
• Big shake-ups at facebook: the Instagram founders left, Brian Acton of WhatsApp left, their CISO bailed, and then there's the Cambridge Analytica thing