> The use-cases are probably rare (I can't think of a situation from the top of my head) I imagine there's quite a lot of them. Things like VP-trees and such

> The use-cases are probably rare (I can't think of a situation from the top of my head) I imagine there's quite a lot of them. Things like VP-trees and such get often built statically and could be implemented in a similar way. Not sure if the simple (2i, 2i+1) schema is optimal for this but perhaps it could be adapted.