re: Hydro & soil?
Pete, I think soil is more familiar to most of us because we are used to growing vegetables, houseplants, and ornamentals. Some of us have just recently gotten into this hobby because it became legal.
The chemistry of Hydro, at least to me, seems rather intimidating, and the idea of an old aching body doing a lot of water changes is out of the question. It SOUNDS like changing out fish tanks (my former hobby), which I had to give up because of the physical work involved. I may be making wrong assumptions here, but the thought of a leaky hydro system on my rugs and floor scares me from even trying ONE pot.
So I, at least, stick to soil in containers small enough for me to lift and move around as needed.
Just my reasons, nothing against hydro, because for most hydro growers it works very well and is well respected as an ecological way to grow food.
Oh, and I have harvested 4 times since March 2015, a couple mature plants at a time (perpetual grow).