mechmouse: I'm sure PAN-AM executive used to think similar things about their airline.
PAN-AM assets were bought by Delta.
I bought games on the old Direct2Drive. That was later purchased by Gamefly, then re-spun as Direct2Drive. And you know what, I still have access to these games. My Impulse games? Still available from the Gamestop app, even though Gamestop is now selling only Steam keys, and GalCiv 2 which I bought on Impulse is also available on my Stardock account. You know what, even my Desura games are still available for download.
Which is why, in my opinion, if my Steam games stop being available it would mean that something really bad has happened to the PC industry in general. I can't think of anything that would cause that beyond something bad happening to the world in general or the PC industry dying.
mechmouse: The laws around the digital world are changing and growing up. VALVe and the whole digital distribution market is going to have to grow and adapt with it.
So far Valve has adapted well enough.