My understanding is that the technical details of the monero fork are on github and some cn coins have already implemented the same.  I was reading issues for xmrig and xm-stak to see where they stood on these changes and according to devs these are already ready to go on the fork (at the time I was reading they just needed final monero code to test against - assuming tests go well then they can release updated versions any time - this was as of a few days ago).

If this is true than all of these asic manufacturers surely must have looked at the proposed monero fork changes.  And if they could fix their machines with a firmware update to work on the new fork then more than likely would never have revealed the machines exist at all.