It's a key part of our 1st day push program: https://codeascraft.com/2012/03/13/making-it-virtually-easy-...
Also it would violate my first rule of engineering which is: "Never build a CMS"
Kellan might have a rule to not build a CMS but we certainly have built one to manage help page content and other knowledge base pages. That content is largely managed by our support staff.
I wrote the current tool but it is actively being replaced. We chose to to roll our own since we'd have to do some work to integrate a third party tool into our database architecture and authentication system. The tool is heavily integrated into other internal tooling and has specific workflows that also make using an existing tool challenging.
The About page content is largely static, aside from the staff photos mentioned in the above post.
A second answer is building a database-backed CMS to replace editing html for every dumb page on the site would be a boondoggle and not an improvement.
"This is what we do and how we do it" with a non-critical system that's approachable seems to be a great way to set up rotations.