At 500 gigs a year, the number of times the keys and button are pressed has to be astronomical. When you think about it, other then the keys on your computer's keyboard, no electronic switches are pressed that often without some degree of failure. The best advice I can give anyone about electronic switches is not to press them harder than necessary. I have a friend who has owned several keyboards and every one of them has virtually been destroyed by punching the keys and switches too hard.
Be gentle!
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)