It can be handy when you're doing a brisket overnight, just a peek at your phooooone when you wake up at 2:00 AM to see how things are going without getting out of bed.
Maybe my grill and smoker are just closer than y'alls then. Because I can do that with the Bluetooth as well. In fairness, I haven't smoked anything since I quit drinking last year, but when I did still drink, that was part of the process of smoking meat: it meant that was time set aside to drink beer and maybe bs with a buddy while "keeping an eye" on the smoker
Now that I won't be passing the time by drinking beer, I may want to venture further away and may need to consider wifi at some point