Most web sites I've seen in industry have just two servers, and only for active-active availability. Because of this, cache locality makes very little differenc

Most web sites I've seen in industry have just two servers, and only for active-active availability. Because of this, cache locality makes very little difference, because both nodes need to cache common data anyway. Cache locality starts making a difference when you have over ten servers, and a significant fraction of the data is cacheable. For "transactional" Enterprise CRUD apps, often there is very little that can be cached due to consistency concerns.