That’s not the point. No matter what prep you make, the question of “do we really want to rely so much on new tech to run everything in our life?” Is a valid question.

Yeah, this is a very reasonable position. Metal keys require no electricity, preparation, or maintenance. Newer RFID keys receive power from the building itself. Phones are strictly worse; they require the phone to have a charge, and they require a mobile app that is well-tested on a wide range of devices. I've never seen a mobile app that interacts with hardware that actually works, so I just don't think the state of the industry is good enough here.

RFID seems like the perfect building access system to me. You can disable individual key fobs (whereas with metal keys you have to rekey the locks each time someone moves out) and they're cheap to replace.

I definitely wouldn't mind having the option to use my phone, but it just isn't a good single point of failure. Software is nice and everything, but not nice enough to control access to my home.