Handsomedan:
Let's face it - most airlines still don't use metal cutlery...since 9/11, it's been impossible to have a knife of any kind on a plane. I deliberately don't take my Swiss Card multi-tool on flights with me, as I know the rules - despite being a harmless little piece of kit.
Metal cutlery is incredibly common. Airlines just don't use it in economy because plastic is cheaper.
As for knives you can take a knife with a blade up to (from memory) 6cm on a flight which means a swiss army knife and most multi-tools are allowed.