Why APEX Matters for MoE Coding Models and why it's NOT the same as K quants

I posted about my APEX quantization of QWEN Coder 80B Next yesterday and got a ton of great questions. Some people loved it, some people were skeptical, and one person asked "what exactly is the point of this when K quants already do mixed precision?" It's a great question. I've been deep in this for the last few days running APEX on my own hardware and I want to break down what I've learned because I think most people are missing the bigger picture here. So yes K quants like Q4_K_M already apply different precision to different layers.