[Quicksilver]

And this is where I go off in a different direction...
I have 3 "clicky" torque wrenches and I rarely use them. I almost always use one of my 'bendy-beam' torque wrenches. Assuming that you checked their calibration when new, don't physically abuse them, and know how to use them: They cannot go out of calibration.
- The Young Modulus if steel doesn't change over time so they remain accurate.
- They will give you a breakaway torque for bolts so during tear down you can see if something has started to fail so you can identify things that need closer inspection.
- They give you a greater "feel" during assembly as the final torque involves more handle movement. This can help you tell if something isn't going together right with a fastener so you can stop and figure it out before it is put into service and possibly fails.