Not really though. The .com crash was really about investors not understanding how to evaluate the profitability of products that have low or no marginal costs.

Not really though. The .com crash was really about investors not understanding how to evaluate the profitability of products that have low or no marginal costs. If anything, vertical farming is an example of the opposite - investors who are used to a low or no marginal cost businesses having to learn unit economics for the first time.