The carbon Strida looks cool but is a letdown.
A Strida 5 comes in at 10kg and it has a rear rack.
So this carbon frame and wheels only saves 1.5kg; I expected more.
Since it uses a non standard crankset it would be hard to take off any more weight.
STRiDA C1 | STRiDA

I watched some videos on the Caracle and it is impressive.
It seems to roll easily assuming the magnet is strong enough over rough terrain.
https://www.youtube.com/watch?v=lbQ6zMtmBOY
This 16" version seems even better for travel although more cumbersome to transform.
CARACLE cary [under development] | CARACLE -the innovative folding bike-