Kinda older thread but I wanted to give my 2c for people that look it up for the debate.
I flushed because that's what I read to do and people that tried my stuff would almost always ask about "how long did you flush brah?"
One grow I decided to stop flushing until I felt like the whole grow was over, then flush for 2-4 days. I was running into this issue where when I started flushing with in just a few days the buds almost stopped changing. For 2 weeks my buds looked only slightly more finished. When I started feeding until the end I saw a MASSIVE difference in my bud development, in every way. Now I flush for 2 days after it's all finished. No one seems to be able to tell a difference and I could tell them I grow in tea's, no till soil, 27816921% organic under a crystal that blasts the plants with pure clean stored sunlight from Sweden and I doubt they would question it.
It's your garden, grow how you like. I like super healthy food and the name of the farm, cow, and what strain of grass it was fed written on the menu... But I also like candy that feels like plastic and smells like unicorn farts. If a 25% thc strain of your preference is no good because you hurd it was not flushed or grown in worm poop I wonder if you can even live up to a 100th of that in the rest of your daily life. I also wonder if someone told you it was grown with a daylight blasting crystal if you would even notice a difference.