If the fabs can build a 1.2M chip for one company then they can and will for all; the ISA question is whether you can use those transistors. In the CPU space you cannot; you are pin-pad limited on the wafer, and more transistors are useless except for heating office buildings. You can use them in some kinds of AI work, and likely also in rare embedded applications, data reduction in your friendly local SuperCollider for example. They won’t run Windows, and the control processors they need (and for which you can see them as peculiar I/O devices) can be Mills.
We still don’t see any prospect of a general change upcoming in the CPU ISA space. Except us. Thanks for your support; we will need it especially as we scale up, which was supposed to have happened this year, but 2020 🙁