flushing is a tool, not a step...if you want more information you can find it... otherwise folks are on here weekly regurgitating the same crap
are you wanting a sassy fade?
is your medium a nasty one?
have you overfeed?
is your cure and or dry set up for rapid turn around of clean dank zaza and you want a small time boost on getting to the finish line?
is your nute line garb?
I flush regularly. In hydro. This makes the turnaround on the system clean better for me... It makes the fade hit predictably (which helps when I know a cut, not when I don't). It makes my cure take 2 weeks and then it is great. If I press any rosin I get a better oil... Anecdotally, I have never skipped anything by flushing that couldn't be fixed by the 'old timer' 3 month forget about your harvest / sleep dope cure.... I'm an extreme flavor chaser, and I can't stand trash flower.... I'm literally chasing single digit percents of free salts... Flushing is on the same order of benefit as harvesting at night. Technically it is correct. If it is done in isolation it will have a nominal effect. If it is done in sequence with a dozen other things all aiming for the tastiest and cleanest flower, then you will cumulatively see the difference in product.