He was alluding to another source, InsideEV's. I don't see questioning the assertion of a purported news source as "crazy talk"
Vehicle content is more than the drivetrain. They could have improved the drivetrain, yest made a number of previously standard items now optional, or simply eliminated them. Note what that InsideEV's article had to say:
Note that it refers to "trim" ... which would include non-drivetrain items.
You may want to be careful chiding others for lacking information that you fail to provide.
The article you're citing could possibly have been worded better, but it is mostly about the difference between the two trim levels of Generation 2.
Of the things on that list "Features of note/significant changes from gen 1:" the only thing that was standard on 2015 Volts that isn't now appears to be the CD player - though I'm not positive what the standard number of speakers is on a 2015.
There are a number of things that were options for the single trim level of 2015 Volt that will now only be standard/optional if you choose the LTZ trim, but considering that they were options to begin with, I don't see that as justification to describe the situation as a mass de-contenting...
Walter