In my experience, apart from on the very cheapest instruments, it is rare to get tuners on a bass that don't work well from new or go bad over time. If yours do develop any looseness, stiffness or jumpiness, a dab of vaseline on the moving parts and ensuring everything is tight enough (but not too tight) should keep them working well forever.
I think I have only changed tuners for aesthetic reasons — all three of my vintage pro thunderbirds look fantastic with Gotoh GB640s, but there was absolutely nothing wrong with the stock wilkinsons.