Sadly, though:

    $ curl -I https://www.nsf.gov/pubs/1998/nsf9814/nsf9814.htm
    HTTP/2 404 
    content-type: text/html; charset=UTF-8
    content-length: 54737
    date: Sun, 09 Aug 2026 17:58:44 GMT
    strict-transport-security: max-age=31536000; includeSubdomains; preload
    server: Apache

What this page doesn't mention is 301 or 302 redirects. SEO has made "old URLs staying live" more of a widespread concern than it was at the time. And WordPress etc ship with inbuilt redirects upon slug rename

So to a large extent this has been mitigated and not using the suggestion here, which is to create a permanent URL ontology upfront

That said eventually neglect, removal, reorgs (or simply websites going offline) still happens... but the way the suggested goal has been advanced is due to becoming a business priority and with redirects and CMSes as tech to help

That said one suggestion made here turned out to be very useful and indeed is the default in WP:

   http://www.w3.org/1998/12/01/chairs

If you use date as part of the taxonomy then -- as Tim BL says here:

> A reason for using a topic area as part of the URI is that responsibility for sub-parts of a URI space is typically delegated, and then you need a name for the organizational body - the subdivision or group or whatever - which has responsibility for that sub-space. This is binding your URIs to the organizational structure. It is typically safe only when protected by a date further up the URI (to the left of it): 1998/pics can be taken to mean for your server "what we meant in 1998 by pics", rather than "what in 1998 we did with what we now refer to as pics."

The headers that push a bit into the margin are an interesting stylistic choice, but why on earth does it have to be random? Did something change that affected the layout somehow? (ironically)

    H1 { margin-left: -20%; }
    H2 { margin-left: -15%; }
    H3 { margin-left: -10%; }
    H4 { margin-left: -05%; }

A classic. This keeps getting more credible as it ages. Now it's been at the same URI for 28 years.

Great article, lots and lots of past discussion: https://hn.algolia.com/?q=cool+uris

It is not only about "coolness" but long-term preservation too; that was one of the main motives behind DOIs.