I think the future will be bringing more proprietary battery/charger lights like this one, and for me I will pass on this light for this reason.
Future buyers of flashlights most likely will not have the knowledge that many on this forum have gained, and people without the knowledge of lithium rechargeable batteries pose a block to market newer flashlight capabilities with current liability concerns.
I certainly hope flashlight design will not be ‘dumbed down’ in order to sell to a larger market.