Not too familiar with electric motors personally but would assume a lot of it is battery technology (both chemistry and manufacturing). My parents converted a

Not too familiar with electric motors personally but would assume a lot of it is battery technology (both chemistry and manufacturing). My parents converted a Honda to electric in the 80s (cool!) but mentioned it was not practical for regular daily use because of the tremendous weight (assume it was all from lead) and low range (would assume dozens of miles). Charging doesn't seem too easy (on the go) either. But they had other friends who seemingly used their also-converted EVs quite extensively locally. Maybe it was always "practical" for folks who wanted to endure but that's different than a mass-produced off-the-shelf Unit.