I have been slowly working my way through the article. It is, as you say, a long read.
So far the article addresses the objections I was expecting to raise before I started reading:
-Texas isn't a monolith (anymore than Alberta).
-rural/urban divide is highly prominent ("FM Texas" vs "AM Texas" as the author puts it. again much like Alberta.)
-gerrymandering gives rural voters overrepresentation.
Still working my way through... have yet to reach the part where we determine why Texas is "the future" or why this may come to Canada as well. As Canada's electoral board is a supposedly non-partisan and independent entity, we should be less subject to gerrymandering.
-k