A couple weeks ago, coming up on my personal deadline for my book I did the most natural thing to do: I cleaned out my e-mail inbox instead. It felt like I was excavating my own personal digital history, in a way that’s more clearly stratified than, say, Facebook is. Of course, there is inevitably filler e-mails – though, interestingly, those filler e-mails are also telling. I only started getting regular YouTube updates in the last few years. I don’t get e-mails about Magic: the Gathering anymore, and that short stint getting esoteric playing cards from Europe. Ah. Those were…