Still something I'd have to think about in 5 years. Also, if I use rechargeables, which I would, it'll potentially be less.

I don't want to have to think about it. Ever.

Also, if you have a bunch of switches in your house, even at 5 years you could be replacing batteries in one switch or another every few months.

At 10 battery operated smart things in the house, thats - on average - swapping batteries every 6 months. As you add more smart things, that frequency goes up. I don't want to be doing that, ever.