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Linux on DeX currently supports one customized Ubuntu image (Ubuntu 16.04 LTS version provided by Canonical) which only operates on selected Samsung devices. (Note9 and Tab S4).
...which runs only on Samsung DeX....


UT is the literal opposite of what this is...
at it's basest belief it works towards running on other devices beyond corporate competitive interest


To make a specific os release run,
a specific proprietary cable is needed,
which will only work on a specific proprietary device or two..

and yes in the end as it was just mentioned, it will suffer the same fate as ED.

DeX and Samsung have managed a proprietary miracle,
a single lane,
turning into a blind alley,
leading to a brick wall.