[reidmcy]

I'm not sure if saying engines don't make long term plans is accurate, since we can set them to plan an arbitrary number of moves ahead. I think you mean that they don't have a theory of mind, and thus don't modulate their play based on their opponents.

[watwut]

No, he means abstract plans. Abstract plan is not exact sequence of moves, but rather general idea of where you want to be in far future.

It could be modulated based on opponent, but does not have to be.