[sdiy] IDC connector reliability?

[J. Verhoeven]

Additionally, I work for TE, and looked up a comparable partnumber. There's a product spec available on the TE website, 108-25034.
This being a product spec (and not design objectives) means that the parts have undergone the complete testcycle in the spec, you can judge for yourself if the conditions in your cabinets are 
more severe than this, -65 to 105 deg C, cycling with 95% humidity etc.

Pretty known, and proven technology I'd say.