Before the Supermicro news of chip hacks, we already learned about the impurities of imported steel and it's why POTUS has opened up steel factories in USA.
Before that is something anons might not know about: Imported/Installed electronic component found in many devices was also found to have impurities causing significant monetary damage and shorten product lifespans: The Electrolytic Capacitor.
"The capacitor plague was a problem related to a higher-than-expected failure rate of non-solid aluminum electrolytic capacitors, between 1999 and 2007"
https://en.wikipedia.org/wiki/Capacitor_plague