I think the consequences are going to be more severe for dead links. Today I deal with permanently dead links pretty much every day. With the canonical URI, the

I think the consequences are going to be more severe for dead links. Today I deal with permanently dead links pretty much every day. With the canonical URI, there is some hope there's a mirror in archive.org or the Google cache. If not, I can search for [parts of] the URI and hope someone mirrored the page, or has quotations from it. bit.ly URIs are a black hole.