I just rebooted this morning and found my wifi no longer worked. I run Ubuntu (devel branch) with the KDE plasma desktop.
Upon investigation, I found that this was caused by the move the devel branch is making from wpa_supplicant to iwd. This should be a very good thing in the end, but if your like me you did *not* have the iwd package installed (nor is it currently part of a meta package). Recent updates have updated the NetworkManager config to use iwd for wifi... so you'll find no connectivity after you reboot.
To get online again, temporarily edit your /usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf file. You'll want to remove ",except:type:wifi" and then restart the NetworkManager service.
After that, you should be back online so that you can actually install iwd. Don't forget to undo your edits afterward - there's no reason to avoid progress!
Later friends!