Suggest user to disable air link when plugging in link cable
After playing with Air-link, I wanted to switch back to a cable connection. I disabled air-link in the oculus software, but forgot to turn it off in the headset.
Then, there was no way to connect to my pc anymore with the cable. I restarted the oculus several times, restarted my pc, checked the usb-cable, restarted the oculus software, and even reinstalled the entire oculus pc suit.
In the end it turned out I just had to disable the air link feature. This was not obvious at all, and lost me 1 hour of gaming with friends.
There could be several ways to improve user experience here, for example:
When plugging in the USB cable into the headset, show a message "You still have Air Link enabled. Disable Air link to use oculus Link via the cable."
Automatically turn off air link
On the oculus software, when attempting to connect (and it doesn't), inform user to disable air link on the headset
It's a strange experience because the PC does connect to the device (it shows up as a USB mass storage device), and the headset prompts for file access. Just the Link doesn't work.

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Scott Beowulf Kaine commented
DUDE THANK YOU!