Similar when during outages (Preventative Maintenance) Thermal scans to look for hot spots.
One good thing about thermal imaging you can capture a hot spot dead on when "energized" (wearing arc flash gear). Dropping power to a building/facility and doing an IR scan is not going to capture much. With the IR collected data, you can return to that de-energized equipment and go right to the problem.
You're right though. $25 +/- is a good investment to have around the shack, and my post exceeds the original posted question.