Most caches are going to have logic for tagging, eviction and invalidation for multiple other purposes, so this makes sense to do. There's some more accounting

Most caches are going to have logic for tagging, eviction and invalidation for multiple other purposes, so this makes sense to do. There's some more accounting each core and L2 cache might have to do, but if the interconnect is up to the task, I'm not sure if this is that much more complex or an increase in latency compared to the old way. Just seems like a more efficient use of die area.