There might be some reasonable compromises to be had. Say, for example, a car with 50% of its batteries in this new fast-charging tech, and 50% slower-charging Lithium Ion. The Li-Ion could act as a reservoir of power for longer trips, but most people would only ever use the Al-ion most of the time.

This kind of hybrid may be impractical because it still requires cooling equipment (and its added weight) for the Li-ion, I'm just spitballing here.