i would not want to run AF indoors because you need to veg for a particular size plant and you dont have that control but lets say youre in cali and want to stay within you legal numbers and grow outdoor and have a few harvests a summer. you would have to do light dep which is a pain or you could use AF plants and when you cut your numbers you just plant more. that or maybe for beginners that want to just do one or two and dont want to worry about lighting and light leaks and such.