Auto boxes ......... have a limited life span, manual boxes will generally last the life of the vehicle with very little attention.
I disagree. A well made auto from the likes of ZF, Getrag or Ainsin should usually last the life of the car with no attention at all. I have never had trouble from our VW boxes which were all still working perfectly after well over 100,000. Even our Focus's Ford/Mazda box seems pretty reliable. And the autobox is protected from the often unfeeling nut at the top of the gear stick.
The advice to change the fluid after such little use sounds to me like either a scam or the post-production discovery that it's a flimsy unit.
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