I gave up after a few section that just read like a really long attempted justification for "business efficiency" that never actually addresses why the REFRIGERATORS AT A STORE MANNED 24/7 need to be able to be remote controlled and on the network 24/7.

It just lays out a series of shortsighted cost cutting decision and says "well they were all logical steps, so it's reasonable that we ended up here, and actually any other outcome is basically impossible" when that's exactly what we're saying. Someone should have pushed back (and probably did) but cost cutting and "just make it easy" probably overrode them.

The S stands for security in both IoT and OT it seems