phone company and many other people can still see where you are if they want
I have expert training in mobile phone geolocation, both as a high tec crime investigator and SAR team manager, and it's very easy to go dark...if people can be bothered. Its not a fait accompli.
In any case, its not compulsory to sign up with a mobile phone company so its the consumers choice to have them process your data. There is no compulsion to do so.
The good news is is ain't going to happen, not least of which is due to the very people introducing it being biblically incompetent.
Then when it doesn't we can get back to the serious talk of Y fronts, bloomers, and how many fit young hitchhikers Pete x-X-x (AKA Xander Cage) has picked up this week.