Starting to see articles on problems that "vertical farming" enterprises are encountering. Basically it's energy costs, which have gone up recently. Unfortunately energy costs can be quite variable, as anyone who lived through the 1970's can attest. I'd also expect a lot of variation as society digests the conversion to renewable energy sources.
(I was dubious of vertical farming from back when it just was pie in the sky, relying on the sun for energy. In the very long range, if we get to cheap fusion energy, vertical farming may indeed become economically feasible. But that's a long way away.)
