W00t, internet high-five!
I'll have to take your word on D2D; like I said, I haven't tried it yet. I haven't really had a reason to -- no exclusives, no major sales, really nothing to get me interested in it over the programs that I already have clogging up my hard drive. I was using it as an example of software that people tend to write off thanks to Steam, but it looks like writing that one off may be for good reason. As for GoG; I absolutely love their distribution system. They were giving away free copies of the Broken Sword remake, so I went ahead and got it. It is the least intrusive DD system I've ever seen -- completely DRM free, and even the one Popcap uses, which is nice and lightweight in its own right, was more of a hassle.
Too bad about their business model; sure, the current copyright holder gets money for the ancient games they sell, but what about the people who actually made them? I love that they have the Wing Commander games up for sale, and I'm tempted to buy them, but morally speaking I'd feel more in the right if I pirated them and sent a check to Will Roberts than if I paid for them and lined EA's pockets. The thing that upsets me most about Origin is that it's the only thing in living memory that EA has done with their purchase of Origin Systems; they seriously screwed up one of the best studios to ever exist.