I think LTE to rural is more their excuse to kill DSL, they don't seem to really care if rural users go to cable, as long as they can get out of maintaining copper.
But it seems short sighted to me to abandon 35 - 45% of your footprint, but most companies as short sighted these days as they follow the investors lead and desire short term profits. It's the same reason they killed the FIOS buildout.
from a cost standpoint it is better to get rid of the copper, and in those areas out in the middle of nowhere- why not replace it with a new next gen wireless network? cheaper to maintain and if they really wanted- they could increase those caps- Clear is unlimited (within reason).
I've also been saying for years that they'll start getting rid of their wireline foot prints - this is just proof. Now you all that doubted me can eat it up. CentLink and the others would be smart to do the same.