In the past month or so, Giorgos and Simon added a feature to the Short-to-Full extensions and the Rust simulator in which an EB also includes IBs from some recent iterations in addition to IBs from the current iteration.

For reference, the feature is controlled by this config file option in the Rust simulator:

The Short-to-Full extension specification Google Doc says to include IBs from the "last 3 iterations", but my interpretation (especially due to the relevant figure in that Doc) is that one of those three is the current iteration. (So this feature results in EBs including 3x as many IB IDs rather than 4x as many.)

This needs to be added to the Haskell simulator.