Modern stuff used as little voltage as possible. We are taking under 1v at times for silicon core voltage. They also use VRMs to dynamically adjust voltage depe

Modern stuff used as little voltage as possible. We are taking under 1v at times for silicon core voltage. They also use VRMs to dynamically adjust voltage depending on load. These days, IO voltage is usually detached from core voltage, and there may actually be multiple IO voltages. Memory and PCIe often get their own carefully turned IO voltages. For lower speed, low cost devices, 3.3v is basically standardized, though on battery powered devices you will commonly see 1.8v. Anything hobbyist is being dragged to 3.3v. 5v devices keep getting harder and harder to find.