I think this discussion is turning stupid and I have had more interesting input in other forums. If one water
pump fails and I am not there to see it the plants die, period. A computer can warn me by sending me a text message. Your main point seems to be that it is more important that I learn to mix the nutritients by hand than having a system that warns me of problems before they kill the plants simply because your opinion.
You are trying to tell me that a 2000 dollar system is overkill when the harvest is worth more? What do you think 10 hectare agricultural land cost in Europe btw?