The differences in state law are interesting, as are the various reciprocity agreements between and among states, In TX, a CC permit does not allow non-concealed carry, so the permit-holder can be penalized if, for example, his coat-tail happens to hang on up on his holster and reveal his weapon.
TX law also permits carrying a non-permit holder to carry a concealed weapon in a vehicle while "traveling." For many years, thousands of motorists took advantage of this provision under the guise of "if the vehicle is moving, I must be traveling, otherwise I would be at home on the sofa with the car in the garage" even if they were going to the grocery store and in spite of the original intent of the law.
A few years ago, however, the law was clarified to define travel as "any movement of the vehicle from one place to another" (or similar) and opened the gates for almost anybody to tote in the truck. The big discussion here has since evolved into the "why should I tell them everything about myself and jump through the CC hoops when I can carry a 9mm in the console and legally have it within reach for a high percentage of the time I want access to it without all the hassle?"
PS:
A guy runs a stop sign and gets pulled over by a local policeman. Guy hands the cop his driver's license, insurance verification, plus his concealed carry permit.
"Okay, Mr. Smith," the cop says, "I see your CCW permit. Are you carrying today?"
"Yes, I am."
"Well then, better tell me what you got."
Smith says, "Well, I got a .357 revolver in my inside coat pocket. There's a 9mm semi-auto in the glove box. And, I've got a .22 magnum derringer in my right boot."
"Okay," the cop says. "Anything else?"
"Yeah, back in the trunk, there's an AR15 and a shotgun. That's about it."
"Mr. Smith, are you on your way to or from a gun range?"
"Nope."
"Well then, what are you afraid of?"
"Not a damn thing."
