> If hosts could be compelled to use digital keypads and change the code after each stay, a situation like that might be avoided in the future.

As someone who's family has run a couple rental properties, I can not imagine trusting a high tragic rental that doesn't use a keypad entry.

You would have to be negligent and perhaps criminally/grossly negligent to rent a vacation rental without changing the locks and/or code. Many states require changing locks after every long-term renter... short term rentals have an even greater need to rotate the lock.

At a minimum the code should be rotated a few times a year and only if you at least get door unlock alerts. If you aren't likely to notice suspicious unlock/entry times then you need to rotate every time. And this is for a remote, secluded rental.

For a high traffic unit in a major city, you should assume that renters are going to stay longer than they paid, enter early, cleaner will skip a scheduled cleaning, etc. The only way to run a decent/safe vacation rental is to use unique codes for every visitor and verify entries e.g. cleaners entered and left at X & Y times, etc.