Any ASIC tech-savvy people know if this slowing of ASIC advances to an asymptote is likely outcome any time soon?
I've mined bitcoin since CPU was the only way, and mined via GPU the first day it was possible, and partook in FPGA designs and finally have maintained relationships with the major ASIC producers of today.
Currently 14nm designs are being prototyped and will be released within the next two years. Things are certainly reaching a plateau.