I think EVs today are intended to last shorter than the battery. There has been examples of model 3s reaching 250k+ miles on the original battery, a number most cars (ICE or EV) do not come close to before being salvaged. There are also startups re-purposing battery packs for stationary use ex. from old Nissan leafs. So I don't think you should consider battery pack replacement costs as part of owning a EV.