I do think a slight dry down is good for the root system.
I'm looking at buying a AutoPot Tray2Grow With a Grassroots Living Earth bed. Jeremy of BAS will be using two in his 10X10 tent YouTube series this next run. Naturally it will be run as a no till setup for multiple grows.
I kind of don't think he will be doing it, but I think I'm gonna institute a weekly short dry down for when I want to top dress, apply compost T and or other liquid amendments.
I do think the price is a little ridiculous for some plastic and some fabric. Each bed will cost $275 and then I need to pick a reservoir.
Two will fit in a 4x4. That's definitely one hell of an expense! II think that properly put together, it will be a pretty much an effortless grow.