I tend to use it for mounts more often than charging, but it’s also great for compact power banks and travel chargers.
At least once a week, I’ll be cooking while I’m on the phone. I’ve got a MagSafe tripod that’ll keep my phone elevated while I’m cooking, so it’s not just lying flat on a table. I can also easily pack up that tripod and use it for nature photography if I’m hiking or something along those lines. I also have an Anker battery pack that charges the phone via MagSafe. I can stick the battery pack on the phone, then stick both in my pocket, which frees me from having to deal with connecting wires (and would theoretically keep my USB C port free for use as a USB connection, for wired headphones or storage peripherals).