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.
Installing an automation and checking battery level manually, or even having an automation tell me to replace the batteries in devices means I'm thinking about it... Not to mention that I still have to replace the batteries which, shockingly, involved thinking about replacing the batteries.