One of the benefits of jet fuel based planes is that they get lighter as the journey continues as they exhaust their fuel, thereby increasing range. Obviously the weight of batteries never does so the current approach of battery powered electric flight will always have this burden with the only mitigation of developing batteries that weigh less.

I'm wondering if they solve for the high performance electric engines, they could pivot into liquid based fuel cells to provide the electricity. Direct Methanol Fuel Cell (DMFC) technology is well known today and not exotic. Methanol is one of the easiest hydrocarbons that can be created with electricity. Methanol is also energy-dense enough to be used as a good fuel too considering the space constraints on an aircraft. Using Methanol as a consumable would mean the jet would get lighter as it few just like jet fuel benefits.

My guess is the current barrier to this is the electrical yield of today's DMFCs isn't high enough to produce the power (energy in a moment) the electric jet engines would require. However, this means its another avenue for research that could make electric jets viable.