The 1Mbit version of ARCNET works out to 18,000ft RIGHT NOW. With a bit of armtwisting, that spec even runs on twisted (or non-twisted) pairs rather nicely.

And as to why they really are not using it, Tell me, who is/was the primary vendor/inventor of it?

That is only a guess, but NIH* is a thing faced all over the world (including my little part of the world)






NIH* == Not Invented Here.