I really have no desire to bring electrical wires to my door. And then we would need a transformer to use it with the door lock. No thanks. Just as it would be a real job to bring electrical power to all of my smoke and carbon monoxide alarms. My camera requires a battery that I have to recharge. (I do use rechargeable batteries almost exclusively). My automatic soap dispensers use batteries.
Yes, batteries are a fact of life. I've learned to live with it. I set a yearly calendar event to remind me to change batteries in various devices such as the smoke detectors. I'll spend a 1/2 hour doing this, and I'm done for a year. Really, really isn't a big deal.
With the Schlage Connect, I can set up automations. At night, it will automatically lock the door in case I forgot and set a tamper alert. I had given some keys to my place to some people that I don't communicate with anymore and don't want to collect those keys. Now, I give a code to those people who need access (i.e. neighbor for emergency, pet sitter), and if they no longer need access in the future, I simply delete the code.
Everytime I open the app, I see a readout on the battery reserve. Really no significant risk of having the batteries run out without plenty of advance warning.
As far as still carrying a key around, again, not a big deal. I carry a fob for my car, a key to the garage, keys for work, etc. I'm now confident enough in this lock, that if I forgot to take my keys with me and locked the door behind me, I can easily get in without calling a locksmith or hoping a neighbor who had a copy of the key was home. And this has happened a few times in the past.
Yes, we have more choices to make regarding both simplifying, and at the same time complicating, our lives. I choose some and reject others. Many times the advantages far outweigh the negatives. That is the case for me using an electronic lock.