One problem I've always had with the Flat Earth Theory is the Earth Plane... is it finite or infinite... Obviously there is a wall which is the cut off point of how far we can explore.
But I always pictured the Flat Earth as a phonograph record, with a bubble (like a bubble wrap bubble) in the middle which would be us... Too me, such a small bubble surrounded by an infinity wide record is wasteful to say the least.
Because I'm not a fan of "Only One"
I found it much easier to imagine this phonograph record with multiple bubbles all over it (like bubble wrap) each being their own earthly existence. I think this makes more sense from a religious standpoint as well. An all powerful God/Creator watching over multiple realities, like a scientist over his lab full of bacteria cultures... A scientist wouldn't only have one, and I don't think a Creator would only have one either. It makes more sense for the wall as well, because then we as creatures of this bubble, would be contained from the others. Who knows, obviously it is just a thought. Getting to the wall and traveling to a point where we could absolutely confirm an edge or not is always going to be difficult.