There's another thread on the homepage right now about Crux [0], which is a database designed specifically to be able to operate downstream from multiple legacy

There's another thread on the homepage right now about Crux [0], which is a database designed specifically to be able to operate downstream from multiple legacy systems using bitemporal indexes to stitch everything together. This pattern is very common in banks e.g. for calculating and reporting on risk positions. I expect you're right that this story is purely about using Mongo for downstream systems. [0] https://news.ycombinator.com/item?id=23493163 https://news.ycombinator.com/item?id=23493163