You could periodically run a script that checks all the records for errors (especially embedded records that might have drifted from their current value, and not been properly changed by the app-level constraints), and automatically correct them (plus log the error).
If Michael Arlington changes his job from "editor in chief" to "founder, former editor, occasional contributor, and CEO of Arlington Investments", and his old posts aren't all updated, it's not the end of the world.
It really depends on the problem domain. You wouldn't run a bank's ledger off MongoDB. On the other hand, a bank's ledger should be radically simple, with little need for normalization.
If Michael Arlington changes his job from "editor in chief" to "founder, former editor, occasional contributor, and CEO of Arlington Investments", and his old posts aren't all updated, it's not the end of the world.
It really depends on the problem domain. You wouldn't run a bank's ledger off MongoDB. On the other hand, a bank's ledger should be radically simple, with little need for normalization.