That's an interesting example that hadn't occurred to me while reading. Beyond the debate over destination/emotional state, I wonder if there is a limitation of how long the trip is? It seems that after a certain amount of time passes your frame of reference might not be precise enough for this effect to be noticeable.

I've put some serious thought into going the opposite direction, and reviving dirigibles instead. Sort of a cruise ship experience, when you need to cross the Atlantic but you're not in a particular hurry.

Unfortunately, I don't think the economics really work out. Except maybe as an expensive novelty.

and yet only 100 years ago, it would've taken you months to travel across the continents to the otherside of the world...how quickly mentality changes! https://www.youtube.com/watch?v=uEY58fiSK8E