To be sure, I'm not looking for an argument. These threads are fantastic, but they can easily get rude and nasty. So hoping to keep things civil, here are my thoughts:
Microbes imported from other geographical regions is not logical / necessary. The microbes best suited for you are already in your backyard. They have proven themselves to be the top of the heap in your area. They have beaten out all comers and are at the top of the local microbial food chain. IMHO, people selling microbes are simply turning a profit. You can't beat local BIMs. You are not introducing some miracle microbe(s). I would argue this forever.
Massive quantities of Microbes have no value in being dumped on healthy, active soil. Starting a soil is completely different. Adding billions of microbes 3 weeks into veg is sort of like taking a highly efficient factory with workers on the assembly lines and flooding the factory with 25 busloads of kids on a factory tour. What's the point and are we sure this doesn't disrupt things?
Another analogy would be a worm bin. The worms, like microbes, reproduce like rabbits. Anyone who has a worm bin would never see the need to add 10,000 worms to an already up-and-running worm bin that has an actively reproducing worm population. There are fistfuls of worms, so what are we accomplishing by adding more? Nothing is the answer.
AACT does not create anything new. All nutrients were already present in the compost, or whatever. AACT is a nutrient delivery system, and so is simple top-dressing or a soil drench. The only difference is the time it will take to sequester the nutrients. AACT has a head start, and if you need nutrients that fast something else is wrong.
As I said before, for anyone reading this, please understand that I'm not looking to argue, and I realize this doesn't fit the weed growing paradigm that many have. What I would like is a peer-reviewed study showing the efficacy of AACT, and to date I haven't seen anything at all. No presentations of this technique at global Ag trade shows, no university studies, no articles in credible trade publications like Acres, and only an occasional blurb from someone like Ingham who is not considered credible by the larger soil biology community.
If AACT were the fantastic program that weedies claim, why isn't anyone outside of weedville using it? I have been beaten with comments like "of course it's used outside of weedville, you asshole," but to date not one person has shown me a commercial horticultural segment that is routinely using AACT. Sometimes we feel that we have some ancient arcane secret grow knowledge that has escaped mainstream horticulture. Clearly that's flawed thinking. So again, if it's so good, where's the peer-reviewed research and where are the farms using it?
Thanks for allowing me this rant. Please, no one be offended. If anyone has data, I would very much appreciate links.