A legacy-free system eliminates older hardware standards like floppy disk controllers, serial ports, parallel ports, and ISA bus slots. By dropping backward compatibility, manufacturers save board space, reduce component costs, and simplify the operating system's hardware abstraction layer. These systems rely entirely on newer interfaces like USB and PCIe for peripheral connections.
Heard on the job
We had to order a special adapter because the new legacy-free motherboards don't have a COM port for the serial programmer.