She is afraid that the next upgrade (OS X) will make
the printer
unuseable, since Apple is phasing out LocalTalk (this Mac is the last
model that still comes with a damn serial port).
Don't worry, 10 different easy ways from little boxes to software running
on a spare mac will convert between ethernet and localtalk. Also while
apple may be phasing out serial ports and localtalk hardware on new macs, I
REALLY doubt it will drop software localtalk support on all the existing
hardware that soon.
BTW I have many of the little ethernet to localtalk boxes, price varies
from $15 to $30 dependingon the flavor.