We would like to slowly phase out this technology over the next few years. Since the cost of providing new PhoneNet wiring, in most cases, is almost equal to the cost of moving to Ethernet we need to slowly phase out this type of network connection. PhoneNet problems are much more time consuming then the same type of problem on the ethernet. Most new Macintoshes have onboard ethernet capabilities built into them. PC's and workstations all use ethernet.
Ethernet fits all devices.