“Absolute necessity” is a relative term. To me, there are probably some medical or hospital applications where PFAS are needed. PFAS are part of the chemicals in some antibiotics. There have to be some exceptions for medical applications. I can live with that.
Scientifically, it is feasible to make electric car batteries, currently, without PFAS, but factories and productions cannot scale it up very quickly. Industry will need delays before they can adapt. However, they would rather not do it. Unless we give them a deadline, they will never do it.