"There are signs up near the cage and at the cage saying they are being declared obsolete"
People have 120 days to cash their chips in. Many will do so. IMO there are far more chips out of the casino than in. Therfore IF any have been destroyed it represents a small proportion only.

PLUS - The new chips were only delivered yesterday. "I doubt" they would have started destroying 3 days ago. What would have happened it the chips were faulty and needed to be re-made (as just happened at the Palms)

There was a thread on this subject not so long ago. Many many times we have been told "the chips have been destroyed" or "the chips are about to be destroyed"
Low and behold 2 years later the entire rack shows up somewhere.

They havnt even destroyed the Binions chips that were obsolete 12 months ago yet Last time I was there I bought 5 racks.