The reason for my confusion is that the Delta heat treat is sometimes attributed to S!K, but it was R&D’ed by three guys, including Nathan and Guy. When you said “their heat treat”, I wasn’t sure if you meant the process of heat treating or an ownership of the particular delta heat treat process.
I actually don’t know who HT’s Carothers’ knives, but Peters is no slouch. Doesn’t bother me that S!K uses Peter’s- some of my favorite knife manufacturers do.
The whole “delta or not to delta” thing is a bad look for S!K, because they sold it as if it was important, and then dropped it as if it wasn’t. Another great example of how S!K looks foolish in aggregate.