The last few days I've been using AVX-512 to optimize matrix operations in a bioinformatics project, and it's great! The bottleneck in most applications is reading the large dataset from memory, so rather than doing it multiple times to compute multiple operations you can do everything in one pass (fused kernel) with AVX registers. 5x speedups are quite common. I've been doing it with manual intrinsics, but the wide crate also makes common operations completely trivial. Highly recommend checking it out.
https://docs.rs/wide/latest/wide/