I don't get it, Redis isn't optimized to be a key/val store like Memcached. Redis does a hell of a lot that Memcached doesn't do, so if we added those operation

I don't get it, Redis isn't optimized to be a key/val store like Memcached. Redis does a hell of a lot that Memcached doesn't do, so if we added those operations to the chart, Memcached would be flatlined. If I need a fast, key/val cache, Memcached is the obvious choice. If I need something different, like a fast set of in-memory, disk-backed queus, or hash tables, or sets, I'll use Redis. It's like saying, look, this hammer puts nails in the wall faster than banging them in with this multitool.