I put this question out there to see how much things have changed in the last 50 or so years.
My great grandpa farmed 80 acres (65 tillable) with a 1946 WC AC, 2 bottom IH, 8ft disc, 9ft cultivator. 1920-46 with horses, 46-60 with the WC.
I still have all of his equipment. What I find interesting, tractors that 50 - 70 years ago were enough to support entire families now are collector pieces to a lot of people. Think how happy the farmer was to get his first tractor and the cost he had to pay.
I do like all the pictures on here of everyone still using their "old" tractors.