Very interesting RFC.
It sounds like we can make "archive" nodes now. If nodes (vaults) carry AGE which are levels of proven resource... then archive nodes are those beyond a certain age?
Has there been a discussion about using the node's AGE to affect their farming rate?
If so, this would encourage farmers to create a few strong vaults instead of many weak vaults. The end result could be a more stable network.
Does higher AGE increase my farming rate?
In other words...
Instead of AGE directly affecting farming rate, it indicates the level of trust earned from the Network. The Network gives the node (vault) more responsibilities. For example, storing "more" data chunks which means more farming opportunities.
It's like giving a new employee 1 hour of work to see how they perform... a probationary period. Current employees are given 8 hours of work. The oldest employees become managers and tend to work more than 8 hours. So while the pay per hour (farming rate) is the same, the oldest employees earn more because they work more hours.