Some applications need very specific drivers and protocols that aren't compatible with normal chips. Or you have to connect to a device via WiFi but still need internet.
Also long range WiFi antennas are amazing.
Maybe the preferred Linux distro doesn't work with them. I had to use another distro for a while because Debian didn't immediately support the card, but there are apparently cases where the internal card just permanently wouldn't work (like in fully free software distros). I would rather replace the card inside the laptop than use a dongle, but idk if this can always be the answer.
Why do you need a wifi dongle when wifi is built into every single laptop sold?
Some applications need very specific drivers and protocols that aren't compatible with normal chips. Or you have to connect to a device via WiFi but still need internet. Also long range WiFi antennas are amazing.
My first thought was hacking.
As I said, specific "applications" :D
Maybe the preferred Linux distro doesn't work with them. I had to use another distro for a while because Debian didn't immediately support the card, but there are apparently cases where the internal card just permanently wouldn't work (like in fully free software distros). I would rather replace the card inside the laptop than use a dongle, but idk if this can always be the answer.