Conventional aircraft lead in range, versatility, infrastructure, and technological maturity, though they fall short on environmental impact.?
Once one realizes that the concentration of atmospheric co2 going from 0.040% to 0.041% is not raising atmospheric temperatures (and thus is not the cause of reported surface warming) then there is no foundation for claiming environmental impact.
But since coupling a non-warming atmosphere to a reported surface temperature rise is a good ruse to employ a lot of engineers to “solve the problem”, then I guess Jean-Baptiste Emanuel Zorg in the 5th Element was correct. Manufacture a problem and then Engineers can feed their families working on solutions.