I don't possess the frontal lobe that most here do but I did some crude ciphering and figure that the battery packs for an all electric C-17 would be so large and heavy that the available cargo payload would consist of a six pack of MREs, a compass and a AAA folding road map.
“Don’t Look Up”! SAS (i.e. Scandinavian Airlines) is planning to have operational their Heart Aerospace/BAE Aerospace ES-30 30-passenger commuter plane by 2028
Hey, a whopping 120 mile range.