FB is doing nothing for our country? Sure Tesla makes great car, but FB is fundamentally changing the way we communicate and disseminate ideas. Facebook is a generator of social movement, catalyzing the free flow of ideas that is so vital to social and economic vitality. By comparison, Tesla is turning out toys.
Have you played around with the new "graph search" feature? It seems to be FB's first attempt to organize the sky-high mounds of data users have added to the site since its inception. The search syntax is probably a little clunky for most users, and kind of reminds me of a DOS command line, but there's something powerful brewing there. Some strings I ran, with entertaining results, were, "pictures of friends before 2000," "pictures of friends in mexico," "friends who like def leppard." It's easy to see how this new search feature will augment FB's ability to do what it does (or it least should do) best -- connect people and enhance the dissemination of information. Facebook adds a social dimension to the web that Google never even contemplated, and now their introducing the tools to start making sense of the connections. I'm looking forward to big things from FB, and I think the stock price should be exciting too.
You raise some excellent points about the fleeting nature of tech companies, but step back a sec and take a look at the incentives. Cell phone manufacturers greatest opportunity is also their biggest weakness -- their users are virtually FORCED to migrate to a new platform every year or maybe three. If they're lucky, they recapture the user. In my opinion, FB has exactly the opposite set of incentives working for it. Considering migrating to a different platform? Unless the new platform makes it a snap to import the last 5 years of your life (which is stored primarily on FB), all those vacations photos, group photos, photos of kids, weddings, etc - which coincidentally are all tagged up, get lost. Dunno about other users, but I value the fact that FB is the most organized photo album I've ever had. Not only that, but is FB is increasingly becoming a viable source of news and information for a lot of users. I personally have "liked" the pages of a number of organizations purely so that I could keep up with what they're doing or the information they're disseminating. My news feed is enriched by all the purposely selected data that gets dumped into it. Sure, I could set it all up again if I had to migrate, but the natural incentive is definitely against doing so. I'm pretty confident that so long as FB doesn't take some step to really alienate their user base, the web of connections they've created will only grow thicker and thus even harder to migrate away from. I guess we'll see what happens, eh?