Admittedly I'm not super familiar with this, but my impression is different. E.g. https://www.faa.gov/nextgen/programs/adsb/faq/ https://www.faa.gov/nextgen/pro

Admittedly I'm not super familiar with this, but my impression is different. E.g. https://www.faa.gov/nextgen/programs/adsb/faq/ https://www.faa.gov/nextgen/programs/adsb/faq/ Why is the FAA transitioning away from radar and towards ADS-B technology? ... The improved accuracy, integrity and reliability of satellite signals over radar means controllers will be able to safely reduce the minimum separation distance between aircraft and increase capacity in the nation's skies.