@matigo Both of those leaks were addressed, though.
The UDID one was closed with iOS 7, almost 7 years ago. (It made signing up test users for ad hoc distribution before TestFlight a right pain.)
The network one: MAC randomization came in with iOS 8. iOS 13 began limiting visibility into WiFi SSIDs and restricting Bluetooth access, both used for location sniffing.
If we could just get browsers to adblock by default…