IME over a decade, the more obscure the source is (and, to-a-degree, the content is) the more likely that the link will fail over time. The links of big instit

IME over a decade, the more obscure the source is (and, to-a-degree, the content is) the more likely that the link will fail over time. The links of big institutions used to change a lot, much less so now. Some, like WIRED, actually go to the trouble of making old content links resolve to their newer addresses. If the content would still have value in 40 years, it will probably survive. (See the NYTimes archive.) But links themselves have little value (unless they're widely published on paper!). There may be a few big institutions thinking that far out.