There's a description of the latter I've spent far too long trying to track down without joy.

There's a passage from Charles Perrow's book Complex Organisation giving several examples of organisational drift (not necessarily decline), posted previously: <https://news.ycombinator.com/item?id=27415476>.

One of the more spectacular cases of organisational decline was the (formerly literary) magazine American Mercury, founded by amongst others H.L. Mencken. It eventually became an anti-semitic rag, now mostly or completely dead, though it seems to keep zombying annoyingly.

<https://en.wikipedia.org/wiki/The_American_Mercury>

There's also video challen TLC, begun as a partnership between Nasa and PBS, now somewhat reduced as well.