I feel inclined to agree with this based on my observation of batteries that can actually be purchased (not hype PR things where people announce a miracle 450Wh

I feel inclined to agree with this based on my observation of batteries that can actually be purchased (not hype PR things where people announce a miracle 450Wh/kg batttery). The electric VTOL companies in this niche that survive may ultimately end up with something like a small series hybrid that uses Jet-A fuel and has a single gas turbine engine driving a generator, along with batteries, and electric propulsion motors. Electric motors and gas turbine in use to lift off, consistent lower fuel consumption gas turbine -> electrical use during level cruise flight, then another burst of amperage and use of batteries during the landing phase.