Keeping it in context for Fallout here...
I used to play Everquest, so bear with me. When porting with a magician or wizard, yeah, it makes sense to be able to travel between continents and dimensional planes.
But for Fallout?
Unless some
lucky player manages to rebuild a car, which would still be difficult to repair and maintain...
Unless the Brotherhood of Steel somehow constructs another Dirigible...
I think you should have to walk to any location you wish to go to.
Traveling in games like WoW is all cute, quaint, and convenient. It's practically a sight-seeing tour when flying between two places.
But in Fallout, traveling between any two points means there's a risk of death involved. You can't remove that aspect from the game.