All very valid points. I don't think the average hobbyist has any idea how long it takes to produce such a complex product with limited resources on a small scale.
And when you consider that PA Semi's target for the PA6T was Apple and Apple surprised them by moving to X86, it didn't look good for the company's long term prospects even back when Trevor may have first considered this processor.

Apple has not committed to keeping this product available over a long term. Nor have they considered licensing it out. The PA6T looks dead.