&gt; Persistence of time series and event type data does not (usually) require the kind of storage solution that mnesia offers<p>Indeed. That&#x27;s precisely my point (just stated better than me). Erlang looks like being a very good fit for a large class of applications of this form. mnesia, on the other hand, is not well suited as the persistent storage for them. It would follow then that it could make sense for the &quot;next gen&quot; storage for Erlang to be more in line with this sort of thinking in the way you describe.<p>As to the drop in $&#x2F;TB, it&#x27;s been pretty steadily exponential. But the cost of consuming and analysing TB of data has only really been practical for non-specialist houses for 5-10 years. When you&#x27;re in the low GB range then a static data picture makes sense. When you&#x27;re able to play with TB of data then a dynamic picture makes sense and Erlang really shines.