The thread starter was referring to the UK's program...
The full program is unlikely to be cancelled at this point.
The largest customer - the USAF - has painted itself into a corner. Even if the JSF is acquired as planned, it will still have a majority force of 40-year-old jets by 2030.
The US Navy is internally split (hence the CNO's hot-and-cold pronouncements on JSF and stealth in general) and hence is easy for the Pentagon top bosses to keep in line.
The Marines want the B, of course, because it is their own air force (neither the USAF nor big Navy wants the B). But it's not (in the Marine view) their money.
For the SecDef and joint leadership, cancellation would be a vast loss of face.
"Too big to fail" means "too big to face the consequence of failure".