You cannot get rid of the entire computerization because of the battery management. Also having some smarts for different terrain conditions generally enable some efficiencies. The hard truth is energy in Lithium ions will never be as energy dense as breaking a hydrocarbon bond. So electrification will always need some computers unlike the efficiencies we can gain from changing the mechanical design of the engine (which can also and did improve with computers).

However as many industries the car companies try to keep the infinite growth premise alive by entirely computerizing all parts and close off any innovation with patents. Just like ICs, in the future nobody will own their car and those who want that will need hundreds of billions to burn to create companies that has no chance of competition.