Dr of BBQ
MC Cable will be a bitch to keep clean.
Not if it is run right and you keep your trunks (bunches of wire) in areas away from greasy equipment, or mounted below counter level so it is not directly visible.
I’m afraid Chef Buba is correct, and I have had numerous health department inspectors get on their hands and knees and remove all my extra steam table pans, and bulk condiment containers on a lower shelf in order to get a better view of the conduit and wall below my counters. Fortunately I’m a clean freak and we keep it very clean, but it takes a lot of time and labor. But just plain conduit is a PITA to keep really clean when attached to the wall. The area directly behind conduit is a perfect catch all for grease, dust and debris. The flex conduit will just be more of a hassle. Sorry.