And the space of interventions will likely also include using/manipulating model internals, e.g. https://transluce.org/observability-interface, especially since (some kinds of) automated interpretability seem cheap and scalable, e.g. https://transluce.org/neuron-descriptions estimated a cost of < 5 cents / labeled neuron. LM agents have also previously been shown able to do interpretability experiments and propose hypotheses: https://multimodal-interpretability.csail.mit.edu/maia/, and this could likely be integrated with the above. The auto-interp explanations also seem roughly human-level in the references above.
As well as (along with in-context mechanisms like prompting) potentially model internals mechanisms to modulate how much the model uses in-context vs. in-weights knowledge, like in e.g. Cutting Off the Head Ends the Conflict: A Mechanism for Interpreting and Mitigating Knowledge Conflicts in Language Models. This might also work well with potential future advances in unlearning, e.g. of various facts, as discussed in The case for unlearning that removes information from LLM weights.