Another, there is.

However, it also meant that soft foods, such as bananas and hard-boiled eggs, made him sick.

Hmm best example of soft food? Hard-boiled eggs!

Blue origins name checks out…

So how did they do it?

I believe thunderfoot talks about a similar concept in this video: https://www.youtube.com/watch?v=XxGQgAr4OCo

At 03:47

This will be good for train travel between different countries such as through Europe, where there is difference between how trains are powered