Comment 6 for bug 1814012

Here's one (e.g. my) case:

Asus AC1200 USB-AC53 Nano wifi adapter. No linux driver available from the manufacturer. But there are open-source drivers available that work well, but that require the -D parameter in order to be able to use wpa_supplicant.

Quoting https://github.com/jeremyb31/rtl8822bu/blob/master/README.md

NOTES
This driver allows use of wpa_supplicant by using the nl80211 driver wpa_supplicant -Dnl80211