My personal opinion flushing does not flush all nutrients stored in the plant itself therefore once you take the nutrients out of the soil, or think you did at least if your using living soil, the plant literally cannibalizes itself by feeding off of stored nutrients. Which stresses the plant out and does not benefit it in the end process where you will see a lot of the swelling come in considering its energy is now switched from feeding off soil and growing to eating itself to try to survive. Regardless you will have nutrients at the end of your grow. There are certain "stress" techniques people believe to add resin production, up the thc count etc. My opinion is i worked so hard all these months to keep the plant green so why intentionally kill her in the end and have a crispy yellow ugly plant to harvest? I feel a healthy happy plant will give you the most out of it. Now certain stress techniques do work like lst and topping even etc but they are also done at a certain time, giving the plant time to heal and keep on growing. If your stressing her at the end of her life all it does is harm her IMO. You will not taste the nutrients, the smoke will not be harsher. Most people once again IMO that state this either dried the flower way to fast or didnt cure it correctly or long enough to get that flavor pull. Also allowing the plant to rot away increases your chances of mold and rot which is no good at all. Product is trash at that point and you will have a lot of wasted time invested. Keep it green my friends!