I learned to drive on a John Deere LA when I was so young my Dad had to hang wooden blocks on the pedals. Then Dad upgraded to a Model M, and we still have it.
It has been used regularly for over 50 years to pull a baler, power the derrick, pull the weed burner trailer, corrugate, haul hay on a platform to feed the cows, power the log splitter, and haul the firewood trailer.
All of my children learned to drive on it, and my grandchildren are learning also - as they get old enough to reach the pedals and see over the steering wheel. There are 4 other tractors on our place but this is the one that gets used the most because it always starts, even though it is rarely parked in a shop.
It finally started using coolant so this month we took the head off, for the first time ever. We are going to have the head checked out by a machine shop before we put it on with a new head gasket. We are also going to repair the brakes. As a child I knew that the brakes were very shaky, so after 50 years, may be it is time to fix them.