Vertical farming stocks.

I’m curious as to y’all’s feelings about vertical farming stocks and their future implications. In theory, these companies offer a necessary service, while also potentially improving on existing traditional methods. You can grow more good per square foot while also saving on water after costs with the proper implementation of gravity feeds. I’m looking at APPH (this is my gamble play since they are not profitable yet, they have plans for up to 12 facilities open by 2025). LOCL, GRWG and HYFM are the outliers I also like in this same vein. I’m not looking for recommendations or advice (although I will gladly accept them) I’m just curious as to how other potential investors feel about this specific market and it’s potential growth over the next 5-10.