I don't NEED fast travel, but I would prefer if games still had an in-universe method of traversing from, say, the Easternmost region and the Westernmost region (i.e. a train, boat, horse carriage, etc.). I just don't like spending significant amounts of time running back and forth through areas I've already discovered all the content in.

I appreciate fast travel in games like Kingdom Come Deliverance, where the fast travel still accounts for the time and resources spent.