I didn't read the article, I was just curious about the costs involved in building a vertical farm because I'm sure it's not as easy as doing it on land so the costs can be very high, and I see several people around me doing this but it's just a hobby and it costs money big enough.
But humans must always be open to technological developments including vertical farming, although so far I have seen it only limited to vegetable crops, not wheat or rice, which are the staple food of many people in the world.
However, actually land shortages only occur in urban areas, while rural areas are still available in abundance simply because of climate change which affects agricultural output, and I am quite sure that land farming will still dominate even for decades to come.