Give Edsel Ford some credit... It took him years to win his father's support for the 1928 Model A. It was a huge step forward at the time, much more refined than any update of the Model-T could have been. Still, the latest offerings from Chevrolet and Dodge were very competitive.
Durrig WWII Henry, going senile, wanted to stop all production and retool his factories to start producing the Model "T" again, To save the company the navy released Henry 2nd to take over snd save the company. The last Volkswagen bug was a far different car from the first, as a result of continuous changes and improvements.