I'm super excited to see this and I'm hoping there's no odd distance limitation. My friends span the globe and I'd love it, if this is a good way to get new and interesting postcards.
It works be great to see mushrooms create opportunities to create friendships too. One thing at a time, I suppose.
What you describe sounds perfect and relatable. It's weird seeing people on the same mushrooms daily, seeing us obviously cooperate and help each other... And we can't become friends because I have no idea who they are.