I don't know about other rock dusts but glacial rock dust definitely doesn't do anything by adding it into your mix. A guy named Alberta organic gardening on YouTube mixes it into his soil and sends in soil tests and also tests on the vegetables and fruit and there isn't a difference.
For myself, I dont need to see soil tests to see that GRD is beneficial for plants. I took some dying yellowing plants that I was literally gonna kill, cause I was so embarrassed by their state.. this was during a move btw when I had two places, one being in the country. it was HOT that summer too.
So anyways, I added some GRD to the top soil and watered it in.. those plants ended up being not only the greenest and healthiest, but the most flavourful and pungent as well, out of the whole lot. They also made the most viable seeds (I pollenated it as well)
I guess a big factor to consider is
fungals, because its the fungi that do the heavy lifting and eating and breaking down of said tougher ingredients... I usually like to put a V10 engine (equivalent) into the soil though, vs a 4 banger or V6..
My latest GRD blend, which is part (beautiful and red) Fe rich sand, actually attracts fungi within days, and you will see air roots tapping up into it, as well as mycelium flourishing ...
Azomite, named such cause it has everything from A to Z, imo anyway, has too many nasties / heavy metals etc in it for me.
I still think Gypsum and basalt and GRD is no match for a soil thats fungally activated and raring to go.
But damn, Wet, I had no idea you were 70.. I feel bad arguing now. Agree with you though on backing off of all needless BS if using powerful and fresh EWC. Humics, etc, no longer needed.. its like adding em twice when you have fresh castings.