Here are some of my "wild Neos". The Amami Island type came to me in a 6 inch x 6 inch plastic pot with roots all around the outside. There was no way I could repot without damaging those external roots, so I just left it. By now, I'm sure there's nothing in the pot, but there are plenty of new ones on the outside. (And a volunteer fern)
The others are just some examples of Neos that started out in sphag in baskets, and took off doing what comes naturally.