Your Routing Configuration Hasn't Been Properly Reviewed in Years
TL;DR — Routing configurations are built once and rarely revisited. Five years is typical, ten is not unusual. The contact centre the configuration was built for no longer exists — but it is still routing every contact you handle today against a reality that stopped being true a long time ago.
This one is published in full on LinkedIn, where the discussion happens in the comments. It runs to about a ten-minute read.