Processes aren't dependant on previous ones. For example AMD screwed up with 65nm, but 45nm were just fine (although under GloFo, but the work had started much

Processes aren't dependant on previous ones. For example AMD screwed up with 65nm, but 45nm were just fine (although under GloFo, but the work had started much earlier). If the next process won't work their only option would be to switch to TSMC.