The main issue with a premix is like the article. It’s fit for a single purpose. I only make pancakes from scratch, admittedly I use baking powder and regular whole milk instead of buttermilk and baking soda. But the benefit is those staple ingredients can be used for all sorts of other recipes. I’m not going to bread chicken with Krusteaz. A premix can’t be adjusted either such as for altitude. Premixes and single use kitchen gadgets are areas where corporations really seem to have done a good job marketing that their products are more convenient than the readily available alternatives.

I don’t know how big the market is for high altitude. The adjustments above 3000m / 10000 ft mean that box mixes are no easier than from scratch. The mix has too much baking powder or soda.