The locks are purely additive in functionality, they lose nothing compared to a manual lock. It still has a key for manual unlocking, still has the twist knob

The locks are purely additive in functionality, they lose nothing compared to a manual lock. It still has a key for manual unlocking, still has the twist knob on the inside. But now I can see the status of the lock if I'm away from home, and I can lock it remotely if necessary. I can give out a keypad code to a house sitter. Or I can let someone in real-time from remote. All my 'smarthome' technology at home is this way. Nothing requires the Internet to work, and if the server fails then only the automation itself stops; all of the switches, locks, and such just fail back into working like any old school switch/lock/etc.