You don't seem to understand what Steam means for the game. Basically the moment Steam closes doors your game will be USELESS and you will never be able to play it again, nor if your internet connection gets disconnected or a number of other reasons.
The moment steam closes its doors is going to be a long,
long time in coming because it's so popular. Further, if your internet gets disconnected, there's still offline mode, and I
still haven't encountered this dreaded "ZOMG, offlinemode will randomly stop working because the evil steam needs to reauthenticate!" issue. How long is it supposed to take to come up, exactly? :\
GFWL was OPTIONAL, it wasn't required to play the game OR the DLC. You just used the GFWL client to buy and download the DLC. Which is a LOT better than this Steam crap. It's unfortunate that you people don't seem to understand that by using Steam they aren't selling the game to us but a service that allows us to play the game for some time (until Steam closes). That is UNACCEPTABLE.
No game in this day and age is selling "the game" to us. They all sell licenses for use of the software. It's been like that ever since pretty much the first EULA. Your running around screaming like the sky is falling is making you look quite silly. Yeah, if steam closes then the game is useless (unless you decide to crack it, or unless Valve releases a patch to allow play based on the stored profile), but steam closing is a lot less likely than, oh, the Securom servers for that game shutting down, or the UbiCloud servers shuting down, or pretty much any other example you can think of because steam is profitable, while UbiCloud or the Securom install limit servers are nothing but a burden on a company.
Strictly speaking, over a long time period, it's a lot more likely that you'll lose your disks than Valve shutting down something as huge and profitable for them as steam.
Again, it'd be just dandy if we could get away with no DRM. Or just a simple CD key. But that's not one of the options. I'll be happily playing NV on steam because as far as DRM goes, it's not that bad compared to the alternatives, and because I very highly doubt that a large and growing service like steam will "close its doors" any time soon.