Their plan C was a complete fluke and only came together because the Israelis managed to put out Centrino. I don't think such a fluke is possible when we're at the limits of process design and everything takes tens of billions of dollars and half a decade of lead time to implement.
Having multiple competent design teams working on potentially competing products all the time is one of the strengths of Intel, I wouldn't call it a fluke.
doesn't it look like they're shifting to do chiplets as well at the moment? copying AMD might be their plan C, but it won't help if AMD can steam ahead with TSMC 7nm while Intel is locked to 14nm for a couple of years. That's going to hurt a lot.
We will have to see if they have plan C now(plan B being yet another iteration of the lake architecture with little changes).