I will mention as to Cliff’s point – SMA connectors are usually rated for multi-100s of mating cycles where I have seen N connector specifications up to 10,000 mating cycles. Lifetime is also highly dependent upon the material quality of the connectors used and how they are treated (eg. over-tightening, rotating the cable instead of the nut, excessive vibration, coupling with connectors that have bent, excessively protruding pins, etc.) Treat your connectors with respect. If you are curious I still put male/female adapters on the N connectors on my other test gear as all it takes is a misstep while trying to connect some stiff heliax to ruin your day, be it SMA or N connector.
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