Netflix has a couple talks about this, but it mostly comes down to for their specific use case, their users don't care about consistency. For example, for your

Netflix has a couple talks about this, but it mostly comes down to for their specific use case, their users don't care about consistency. For example, for your viewing history you might not entirely care that it is 100% up to date and the last video you watched isn't available. And for the times you do care, most users will simply usually refresh the page (and since, in almost all cases eventual consistency means resolution in seconds rather than instantly, most users will have the correct info after a page refresh). I can't find them right now, but Christos Kalantzis (@chriskalan) has a number of talks on using Cassandra at Netflix w.r.t eventual consistency.