Modern cars have alternator regulation performed by the ECU rather than simple onboard machine sensing voltage regulator. This allows smart/intelligent charging and safe use of higher current alternators as well as sensing closer to the battery. On top of this the ECU is aware of the cars electrical demands and can perform temperature compensation.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone