I use it daily for connecting it to my car stereo, and about once a month when I mow my lawn or have to fly on a plane. I’ll never buy a phone without one.
I prefer wired headphones. I don’t want to worry about keeping them charged, and the few pairs of wireless headphones I have tried died or had the buttons stop working after a few uses from getting waterlogged with sweat, while I’ve been using the same pair of $6 wired headphones for 10 years without issues.
I don’t care for Bluetooth or USB audio connections as they don’t always work intuitively, they might take multiple button presses to set up, and every manufacturer seems to think they need to be set up in a slightly different way, while the auxiliary audio cable just works with no setup.
There’s a moose loose in the hoose.