Those of us that have 10+ watches, will alternate from day to day. I, myself, have changed watches 2 - 3 times a day... although not that often.
Most of the watches don't get worn daily... maybe once a week, some once a month, some twice a year. So they last longer than watches that are worn daily... hence I don't get most of them serviced as long as they keep good time.
I do plan to get one of my watches with A7750 serviced cause I intend to wear it more often.