Helix is adding a Scheme for programmable configuration.

With programmability, you can have a lot more state and contextual behavior. We get this kind of fine-grained stuff in Emacs with repeat maps, transient maps, heuristic DWIM behavior, state tracking per-buffer etc.

As LLMs lower the cost of having that 8th or 9th language, you can expect programmable tools to float up in the market.