The death of IGN's Livewire. I haven't seen a decent, lengthy developper interview since they closed that down.

I remember saving some of Warren Spector's interviews. I can't remember for the life of me what he was working on, but it was great to have him seated down, discussing his game, and then listening to him talk about the show. Everything was so much more in-depth than what we're getting now. In the twitter world, it's just quick info, and then blam, it's down. 

The death of lengthiness!