I find myself wanting to verify that my installation is not broken in obvious ways (missing or corrupt files, for example). A sanity-checking tool would help. This idea is modeled on the old 'pkgchk' (package check) utility shipped with Solaris operating systems. See https://docs.oracle.com/cd/E36784_01/html/E36871/pkgchk-1m.html
pkgchk consults a manifest of the files which are supposed to be on my system and verifies they are present, with the correct ownership, permissions, and checksums. Running such a tool would give a first-pass sanity check when debugging a new problem. It would let me (and the support analyst) know that we are starting at the right baseline for debugging operations.
This can also be useful for security audits -- it would permit the immediate flagging of modified files.