Thanks for your encouragement! We are working on quantization as well. We recently submitted a paper, Atom [1], that uses 4-bit quantization, delivering 7.73x throughput compared to FP16 and 2.53x compared to INT8. Atom is able to maintain a perplexity (i.e., model accuracy) close to FP16, outperforming existing quantization approaches.
We are polishing the 4-bit code. It will be added to Punica code base soon. Please stay tuned :)