As another engineer, yes I do understand iteration. But when you look at automobile manufacturers design direction, there is little to no "iteration" happening with entry level cars. GM tried, and were so close. It remains to be seen if GMs new Ultium battery will restart an entry level push from them.
But no one else, (outside of China), is taking that tack. They are shooting directly for the upper end of the market. The markup is better and less effort is needed. This will stifle the total market and overall development of EVs. EVs are playthings for the rich.
Remember Henry Ford deliberately designed the Model T so the average consumer could afford it right from the start. Ain't nobody in the west filling that role that I see.