Not sure if I support adding it to /about but adding /version that return version (and plugins list) is something I totally support.
There is actually quite a lot of value in having a public plugin list cause we can then help alert various forums in the wild if they have plugins that need updating.
Added pr-welcome for /version that is a static text page that shows version.
Public plugin list and plugin version is open to discussion. May need to add a switch to optionally hide.