> when do you move from using in-application data structures? as soon as you need any of these: * a relational model -because you need to model your data that

> when do you move from using in-application data structures? as soon as you need any of these: * a relational model -because you need to model your data that way or you are required to because someone wants to consume it with tableau-. * concurrently read/read data between 1+ instances. * a standard way of doing backups. moving from that to a database would probably equal a rewrite.