Going through the django documentation, this sentence on mixins states:
"In practice you’d probably want to record the interest in a key-value store rather than in a relational database..."
Why? Why would one want to record the interest in a key-value store, as opposed to in my postgres db I already have for my django app?
Does this mean use a dictionary and store values on the model? Thats still in my db?
Does it affect performance?
