You're Not the Only One:
We still have a chest freezer that requires defrosting. Although, its a pain in the butt because of the tiled floor, and inaccessibility to the door :/ So we haven't dealt with it for about 2 years. It isn't opened very much anyhow - so its "all good," really.
Then theres the "beast," a Fisher and Paykel N388 'Frost-Free' unit. Well, a glacier has a tendency to grow (and has done since new) on the bottom right of the interior. So it gets defrosted every year, along with a bit of cleaning and scrubbing around the evaporator, checking for burning wires, and putting vaseline on the Evaporate cover seals. The evaporator is theoretically in the cabinet - not behind the walls or in the floor.