In 1973 Deere could sell every Gen 2 Waterloo tractor (4430 etc.) they could get move out the factory door. There was a waiting list for those tractors and they were selling for close to list price. Farming was profitable, farms were getting bigger and farmers were trading in nearly new tractors of any brand to get a bigger tractor with a quiet comfortable cab.
JI Case introduced the first really good cab tractors in 1970 (1070 etc) and the rest of the industry was scrambling to match their cabs. Deere got their Gen 2's to market 1 to 2 years before IH (1974 86 series) and Deere made money hand over fist before the competion caught up and then the farm economy collapsed around 1980.
If the market for tractors would have been slower then a smaller Gen 2 rowcrop tractor might have made sense. With the limited production capacity at Waterloo should Deere have turned away highly profitable orders for 4430's and 4630's to build smaller less profitable tractors?