What's not to get? You want to quickly give someone a skill? You cram Active Hardwires into them, you want to have someone who can easily swap between a variety of skills, you get them a Skill Jack/Wires combo.
Also worth noting that Skill Jack/Wires is more current technology, read the fluff on Active Hardwires and it mentions that it's old, practically discontinued tech making it much cheaper to manufacture.