Not to mention that web workloads are frequently memory-bandwidth-sensitive. I remember Google published a paper where they measured CPU usage in production env

Not to mention that web workloads are frequently memory-bandwidth-sensitive. I remember Google published a paper where they measured CPU usage in production environments and at least one of their real-world applications spent like 30% of its time in memcpy/strcpy. (The paper examined ways to optimize those copies by carefully applying non-temporal hints in the event that the destination buffer wasn't going to be used for a while). Given that, having more memory bandwidth per-core seems like it could easily improve CF's performance a lot.