I've had a key break in a deadbolt lock before. I can go running without carrying keys. I can assign a temp code to my pet sitter/handyman/whoever without having to police up keys or worry about keys being copied. I know when and which code is used, in case of an incident (none so far). My partner has lost 3 mailbox keys and zero house keys (since there is no house key). My door auto locks, and forgetting to lock your door is one of the biggest security risks, since crimes of opportunity are so much more common than targeted crimes. I've given my neighbor access during an emergency while we were out of the country. I can pre unlock my door from my smart watch if my hands are going to be full. I absolutely think the cost and effort were worth it for me.

Time to upgrade to "smart" partner