The cheapest device in your plant might have the biggest blast radius.
A boiler or steam generator may look unimportant—until you map how many other systems depend on it.
Criticality lives in the dependencies. See the full talk here:
youtube.com/watch?v=1f3CQp…#OTSecurity
Palo Alto Networks surveyed 1,600+ critical infrastructure leaders. 68% lack full OT asset visibility, 42% say unpatchable legacy gear is their top risk, and only 40% have compensating controls. OT VM needs plant-level triage, not CVE theater.