You are right, most batteries last longer and perform better with gentle charging and discharging cycles. The converse is also true. Constant rapid charging of EV batteries is detrimental to their lifespan and performance. This is often overlooked as one of the costs of an EV. This contributes to the abysmal trade in value of EV’s. When you factor that in to an EV’s expense, It becomes insanely expensive compared to ICE powered vehicles.