This is an interesting headline: 

"I Bought a Book About the Internet From 1994 and None of the Links Worked"

What's interesting? That's only 5 years before linuxbios started. I can make the totally unwarranted claim that the half life of a link is around 12 years. I justify this claim with one bogus data point, namely, this headline :-) 

But still, what's amazing is when I did a check, about 15 years after linuxbios began, about 25% of the links were in fact dead. So the 12 year number may not be great, but ... maybe it's not that bad either.

And now you know why I don't like links in commit messages :-)