The statements laid out in the post you linked to suggest seem to suggest that we ought to add fairly large amounts of calcium (depending on source water) due to it being necessary for certain reactions. However, other posts on this thread suggest that this style is best served by lower calcium levels.
Are you suggesting that we should follow the guidelines of the link for brewing neipas, or are you suggesting that we don't want those reactions to occur and that's why it's being suggested to lower the calcium levels?
My thoughts/questions exactly. Many of the calcium-related processes described by Ipscman on the probrewer forum are detailed in common brewing literature, and I would posit is a relevant factor behind the aesthetic characteristics of beers coming from English- and German-derived brewing traditions--bright, crisp, and efficient. Calcium is not an ingredient per se, but rather a catalyst (or requirement) to a handful of distinct processes.
NEIPA obviously turns this all on its head. In the homebrew world, such as the various podcasts (Brulosophy, Beersmith, Basic Brewing, etc) and popular authors (Strong, Mosher, Tonsmeire, Janish, etc) point to a whole array of explanations for what makes a NEIPA a NEIPA. None of it is convincing and I'm glad couchsending shat on all of it earlier in this thread. The Brulosophy guys have landed on a stance of "it's a mix of all these things together that make NEIPA". I'm not buying it.
I just built out a spreadsheet to incorporate KCl into my salt additions. It's awesome how much leverage it gives you among the other salts. I'll go for something extreme, just to see the effects: 20ppm Ca, 10ppm Mg, 25ppm Na, 150ppm Cl, 100ppm SO4, and 100ppm K.
In my mind, the importance of this whole exercise goes beyond NEIPA. It opens a door to so much new opportunity with any other experimental beer genre, and it doesn't even have to be so extreme like all this milkshake BS. Like haute fashion, nobody actually dresses like a Native American made out of teddy bear fabric on fire with machetes attached to the ankles, but I sure hope some artificial boundaries were broken along the way.