This is turning into a survey question
... so I'll gladly oblige
On NW, coach meals have had all plastic silverware. I think that was a pre-9/11 cut.
First class passengers now receive a metal spoon and fork, and a plastic knife. We received a note apologizing for the plastic knife "due to security concerns" on the MSP-BWI dinner flight September 21st. On the latest first class MSP-BWI flight (May 3), the plastic knife remains with no apology note.
Create your own luck.