Buying games that are available online only is like buying dust to me ... Servers can be switched off one day (and the usual argument goes like "but steam will be there for a long time now"), but even big companies like Microsoft and EA turn servers off ... So why should be any other company be any different ?
Then GOG is your friend. DRM free, you can use Galaxy for convienice but you can also download installers of your games and create backups in whatever manner you want with no DRM attatched.
Granted it is usually against Microsoft and EA interests to keep the servers on, while they are in interest of steam as long as they exist. But I am a GOG man these days.
