So far the vast majority of complaints have been nothing burgers. The biggest valid complaint is the lack of dedicated mask registers for vector processing, th

So far the vast majority of complaints have been nothing burgers. The biggest valid complaint is the lack of dedicated mask registers for vector processing, that's a huge design flaw in the vector instructions since it makes register renaming and shadow registers mandatory. In other words, the problem here is that they didn't stick with the RISC philosophy of making everything explicit. Compressed instructions are mostly wasted encoding space, but from a performance perspective they don't matter. If they are slow then compilers will treat them as slow legacy instructions and stop using them or they will only emit aligned compressed instructions.