Area-codeless dialing has been dead in many places for ages. My city has had multiple area codes since at least 2000 and so everyone has been providing area codes for well over two decades now. Especially too now that we have people keeping the same phone number for decades (hell, for life even) regardless of where they eventually move, trying to support this feature is a losing cause since many people would be forced to figure out the unstated area code in order to dial.