That's a good question. Ya know I grew photos for years and still have enough beans from friends and those I cross bread myself to last a lifetime. 

I think it has to do with several different factor's. Unfortunately I'm not able to be lets say open about my gardening so the less of a footprint the better, 1 tent, 1 light, 1 timer and so on. Being able to run start to finish and keep a cycle going for me is invaluable. A fast finish is another. The last one harvested only went 70 days and was the bomb. I think it's just running something new in the end.