I feel a particular mix of disappointment and loss(?) every time I encounter an interesting link on a long-dead site only to find that the target, never saved,

I feel a particular mix of disappointment and loss(?) every time I encounter an interesting link on a long-dead site only to find that the target, never saved, is lost to time. And the same for pages with crucial, unsaved images. Better the proverbial ignorance, I guess. Though, have you looked at the Wayback Machine Site Map and URLs views for your blog? On the off chance that the Alexa crawler could already extract URLs from JavaScript back then, there's a possibility that additional requests were captured that can't be played back in the Wayback Machine. (This all assuming the site was served over HTTP to the crawler--otherwise it would have only gotten an 'unsupported' page, right?)