Door locks are something that needs to just work. I’m not going to take off my gloves and fiddle with a combination in the cold, nor am I going to hope my fingerprint works despite dry cracked skin. I understand Bluetooth is painfully slow. Home key seems best and everyone I know has a iPhone but conceivably some people may not. There are a lot of solutions that don’t “just work”, but maybe Apple can do it. Responsiveness. Reliability. Convenience. Just works. For all.