Twinax is used only for point-to-point links over short distances with manufactured cables with connectors on the end -- I understand this eliminates basically

Twinax is used only for point-to-point links over short distances with manufactured cables with connectors on the end -- I understand this eliminates basically all of the pain associated with 10base5 and 10base2: It's just a somewhat inflexible cable at this point, and you're not running them in ceilings, to cubes, or such.