Nothing is ASIC-proof.
Exactly, so many people lose sight of the fact that ASIC is an acronym.
Application Specific Integrated Circuit
Very specifically means it's an Integrated Circuit for Specific Application...
The only reason a coin/algo/mix will ever be "ASIC Proof" is if it flops so hard no one ever even began to care for it and thus never was worth thinking about how to build the IC for it.
