Even Ryanair turnarounds take like 30 minutes. A bit more than that and you can charge the plane comfortably. Fueling bigger planes is quite the ceremony.

Making the battery replaceable by heavy equipment would drop the turnaround time for these. The planes fly regular routes (mostly), and could store a few extra batteries at their regular destinations.

Odd added benefit: the potential ability to jettison a huge part of the weight in extreme emergencies to increase flying time by the backup ICE system.