Nothing came to mind, until I read @
bmthom.gis comment about how "it would be nice to have S&S couplers so I could take it traveling with me," which reminded me of this.
It's interesting to explore the boundaries of the possible - the highest, best and most beautiful and all that - but I don't really like the idea of finding things to covet, and find so much talk about "bucket lists" tiresome. Nevertheless, there are times I think of a more ideal life I might lead, and in that life, I'd have a bike like this.