Having read just the abstract is seems that current implementations of Mac address randomisation is essentially useless rather the Mac address randomisation itself.
Hopefully in the future the implementation will improve. Until then WiFi is off.
Only as far as it goes. Tracking isn't as fine grained. Service providers main concern is the service. Can you be tracked this way? Yes, but not as easily as this is talking about
Hopefully in the future the implementation will improve. Until then WiFi is off.