Running a house you are not in
A weekend place is a house you manage from somewhere else. Monday through Friday you are in an office across the Metroplex, and the cleaner needs in on Tuesday, the dock repair crew on Thursday, and friends are borrowing it for Saturday. Keys for all of them means meeting people, mailing copies or hiding one under a planter that everyone on the street has seen you use.
A Wi-Fi smart lock turns that into a few taps. Each visitor gets a code, the app tells you when it was used, and you can unlock the door for someone standing on the porch while you are still on the I-30 bridge. When the season ends, the codes go and the door never changed.
Full-time homes get just as much out of it. A commuter who leaves before sunrise has the door lock itself a minute after it closes, kids walking home from the bus stop each have a code instead of a key on a string, and a parent at work sees the moment they are in.

