A more long term viewpoint would be interesting. All the affirmations in the article are done with the current state of the art. Extensive farming has improved for thousands of years. Vertical farming is very new and room for improvement in a controlled environnement could be huge. Moreover, the main critic compare solar to fossil energy costs (in dollar and space). What about going nuclear ?

Moreover we always learn a lot when we go sideways. What about useful discoveries for space exploration ?