I like the reruns! I haven't read all the sequences (and I'm sure I'm not the only "regular" (for some value of regular) who hasn't), so it's interesting when a post I haven't seen (or can't remember) pops up.

And even if I have seen it, often posts are worth a re-read. Or, spending a few minutes thinking about it again.

(Sure, I could go through them day-by-day personally, but I don't think I would do it reliably by myself.)

Furthermore, it means that every sequence post gets a summary in the wiki (thanks MinibearRex, and others!).