Door locks are security theater anyways. If someone really wants to rob you, it's not difficult to get into a house.
> Are you going to remember to check after every firmware update? Are you even going to know if a firmware update is issued?
No, for the same reason I don't check if my computer requires my specific password every time I log in. I'm not that paranoid.'
> Will it still be magical if you get declared a legacy customer and your door is programmed to unlock and stay unlocked?
That has never happened. Even in the example you cite, they caved and offered users a full refund.
> Myself, I'd prefer a door lock that locks only when locked, and unlocks only when the correct key is inserted into it. I've /certainly/ seen one too many crazy software errors to believe in a stove that has the ability to turn itself on and off.
Go for it. While you're at it, make sure you don't get a car that has a remote start or an unlocking keyfob, or a safe that unlocks with a code. Wouldn't want that scary technology near your locks.