Nobody said it isn't. You misunderstood the discussion here.
I quoted "In the long run, the utility of all non-Free software approaches zero."
hutzlibu said the same problem affects all software, not just non-Free software. In a constantly changing computing environment, even free software is affected. Nevertheless, hutzlibu was in agreement with the "spirit" of the quote, because at least the user still controls the software, and it's possible to migrate.
einpoklum disagreed, using BSD utilities as an example - showing how free software can be unaffected.
Disclaimer: I didn't downvote the parent post - Why is my parent post downvoted? There's really no disagreement here.