The standard "blue-collar guy knife on belt" didn't suddenly become illegal with the new concealed carry law.
They probably were, and still are under the length and other rules required to make it a "weapon". You can put a two inch folding Gerber in your pocket and go where ever you want, could before the law, and still can. If someone asks, it's a tool used to open boxes not a weapon. (Same thing applies to anything, pencils, pens, etc.)
Sure, some Po-po or person with a chip on their shoulder may make a big deal out of it, but if you are minding your own business and not a rowdy drunk chances are nothing will happen. People just don't care that much.