If the 180nm design is good enough, and migrated it to a new process, you'd get more chips per wafer.

Hence never competitive. "It's open!" doesn't make a business decide to buy a million and put them in a product - cost, features, availability, support do.

Nobody cares about "open silicon" - it's only spouted by people who don't understand actual electronics, or if they do, they certainly don't understand the economics.

It will never happen. If it did, it wouldn't be useful. It makes zero sense.