Pretty much, yes. USB ports are smaller and more versatile, and can carry a limited amount of power. Serial and parallel ports are larger and more limited, and cannot be "daisy-chained" like USB devices usually can.
A bus typology
Legacy technology
No, they are not.
Legacy Equipment
No, they are not.
Legacy Systems
No.
A "legacy" system is one that is either outdated for most practical purposes, or one that includes older forms of technology. A "legacy-free" PC is one that does not include older ports that would be necessary to support much older equipment, such as parallel ports, ISA slots, serial ports, PS/2 ports, and sometimes even VGA.
yes
He wanted to become famous to carry on his father's legacy
Yes, it becomes uneconomical to re-write computer programs which work perfectly well, especially if it is possible to run it on newer servers.
go to darkovia and click dracowerepyre legacy