Still have several keychains. One for each of the four vehicles we own; house key(s) are on each. I got into the habit of having separate groups of keys, instead one with everything on it, once we had more than two cars. Each non-Telsa car has a fob; the BMW with the integrated key-remote, the Nissan and Honda both have pushbutton start so the remote (fob) doesn't physically need to be inserted into the ignition. My Tesla keychain consists of a plastic card holder for the keycard and a single house key. When at work I carry my BMW ring in my computer bag as it has several keys that are for work, along with a USB key, storage locker key, etc., etc. When the Model 3 fobs come along, one will replace the keycard as I anticipate that it will be easier (and more useful) to use.
At the moment I have no desire to change over my house locks to smart ones.