That chip is too complex for me. My cutoff is chips with one metal layer. I don't have a good process for removing one layer at a time if there are multiple metal layers. Also, Moore's law means that chips get exponentially more complex over time and my skills don't grow exponentially :-) Finally, I'm limited to about 1um features before microscope quality and the wavelength of light become a problem. Thus, the early 1980s is about as far as I can go.