Funny question maybe:
I'm in the planning of a hike, 10 days with my wife, and I'll continue another 10 days solo.
So when being together we would like to have some, if very little, luxury and a somewhat spacey shelter.
When continuing solo, I would save weight as much as possible, and easily can live with a very small shelter.
I expect the trip to be quite wet and windy, as this is our usual everyday weather.
And I have to buy some kind of shelter anyway, as all my stuff is quite old and heavy.
So the idea popped up, to get 2 pcs of a kind of shelter that we can build into one roomy one, as well as use 1 pc as a small single shelter.
We both will carry a simple rain poncho anyway, if this might help.
Anybody ever heard of such kind of shelter?