Run a market survey and you will find out
why people buy these NAT devices. It shouldn't be that hard, you can hire
one of many consumer research firms to do that kind of quantative research for
you.
While you are at it, you might ask if they
know about TCP/IP, and what they know about the 4th version of
IP. I suspect people understand IP just about as much as they understand
the nature of powerline transmission or the nature of AC electricity. It
is probably a hallmark of success of an infrastructure that "it is just
there".
You are of course correct that I am most
likely overstating the reasons people purchase NATs, and I am certainly dating
myself. I suspect a more recent survey will reveal that people get
NATs as a side product of purchasing wifi connectivity.
regards,
peterf
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