Unlikely to happen.
The reason why we chose not to use Labs is because we need to monitor user behaviour on the new navigation vs standard app. If it’s in Labs it would be impossible to track long term usage. For example we have given the new navigation to a small number of new customers without them being aware they’re on a different version of the app.
As we settle on a direction for the navigation we’d roll it out to everyone progressively. As we move forward we might choose to isolate specific components of the app for a Labs rollout. For instance a new budgeting method (no plans for this now).