Our demo forum is in a sandbox environment separate from our primary network and it's getting traffic and loading (at least based on our logs). The production system is still pushing median API response times of 1.608ms (a drop of 0.2 since I last looked).

As far as redis, we've put a great deal of effort into our redis infrastructure. We heavily shard and replicate data in such a way that memory constraints are not our biggest concern.

In any case, thanks for your thoughts!