Child, six, seriously considering running away from home after parents refuse to serve dinner on dinosaur plate.
People realize that Steam doesn't use physical media, right? The real issue is the lack of consumer friendly regulation, not the medium.
On the other hand, I know for a fact that sony will do the worst possible thing over and over again every time they have the chance to.
Remember that time Sony took away features from the PS3 that were advertised selling points? Remember when modders added the features back and Sony sent them to prison?
Steam has issues, and you certainly can't (legally) trade or sell your library, but nearly no single player games on the platform have DRM. Thus, you can have as many off-Steam backups as you want (which can't be remotely deleted/disabled), and you could certainly "give" the game to a friend (but don't copy that floppy), or otherwise preserve it for posterity.