What does the polymer do to wafer yield at sort? To final yield at assembly? What are defect rates (not hand waving, actual data)?
Where is the reliability data?
How does it perform at ever decreasing geometries? How does it perform using EUV lithography? That will be an absolute necessity at 3 nm. Has it been evaluated on an Extreme Ultraviolet stepper on a production line in a fab?
Running product in a fab isn't a science project. It must provide profitable and repeatable yield. I have not seen the company address any of this in quantifiable terms.