Drywall/keyhole saw for drywall, razor knife for romex. Carry any knife u want to cut your

. I’m a newly retired IBEW 38 Wireman, who spent 40yrs working on commercial/industrial jobs. As was mentioned use the right tool for the job, if you’re a commercial electrician you should have a tool bag which should have a drywall saw and razor knife for the dirty jobs.
I still carried a folder to work, CRK, Hinderer, SPY, ect. ect. and mainly used them to cut tapes, jet-line, open boxes, strip wire, and cut my lunch. My only folder suggestion would be a blade with a stronger tip. I carried a Spyderco Techno to work everyday for 5 yrs, and after that a Spyderco Native 5 and they did everything I could ask of a knife. Although the Native 5’s blade bent a little while trying to pry a sheet of drywall off the wall.
Most of the tradesman I’ve encountered over the years do/did not carry pocket knives. The majority mostly use razor knives, the ones that did carry mostly carried cheap Chinese crap. Occasionally I’d run into someone with a Kershaw. The last job I was on prohibited pocket knives altogether, and the use of a razor knife was only to be used as a last resort. I retired at the right time!