generally speaking, i think translating atomic movement rates for combat into movement rates for large-scale travel feels too finicky and requires more granularity of maps (e.g., basing it on miles rather than hexes, or using even smaller hexes) which i don’t care for.
it’s a concession to the original game that i use speed rating at all in dungeon contexts, since i prefer to count rooms and lengthy hallways as always taking 1 turn to traverse.