We have lots of moral options for traveling over land, and even some options for relatively short oceanic trips, like across the Atlantic from W. Europe to/from N. America.
What are the current possibilities for traveling from e.g. USA to Taiwan? I’m willing to entertain options that don’t have “mass market” appeal.
Some crazies have been spotted using a solar powered electric motor with a diesel generator. Which is nuts. So they have the weight of an electric motor, a diesel engine, diesel fuel, and batteries, and copious points of failure.