Also, Wayfair hasn't seen a huge appreciation and TripAdvisor has been around since 2000 (admittedly, Yelp was founded in 2004). And HubSpot and Wayfair are based in Boston, and have been relatively underhyped.
Facebook, however, has been demonstrably successful since going public, despite the massive SV hype. Zuckerberg and his team deserve full credit for delivering on a successful mobile monetization strategy and making some great acquisitions (particularly Instagram, given its acquisition price and its estimated valuation now.)
All fair points! Though I'd argue that ecommerce has been challenging—Zulilly went from IPO to salvage sale in about a year, compared to that Wayfair's slow but steady growth is a success!
The TripAdvisor/Yelp comp is great—they're direct competitors. TA also didn't really launch in its current form until 2002 so it's not as unfair as it appears on first glance!
I just test drove a TSLA car today. I "summoned" the car from its parking spot. I then drove around town (in insane mode). Turned on autopilot and the car drove down the highway by itself (changing lanes when directed). Went back and then car perpendicular parked itself.