I’ve done both, with up to eight people in a tent and it works out well,  but prefer to be solo as I sleep better and if I’m wide awake in the middle night I can work on mapping, writing out the past days hike, or organizing without having to worry about the other individual.
When sharing a tent, some people may feel uncomfortable doing this but really it’s no big deal if you communicate well and let the other person know of any concerns or just saying “Hey, this is a little uncomfortable, let me know if you feel the same, what are your thoughts on this?” or something to the same effect just to break the ice. Â I see no difference in sleeping next to someone in a tent versus sleeping next to someone on an airplane, and I’m sure very few, if any, would have any concerns sleeping next to someone on an airplane. And if you do feel uncomfortable, but have to share a tent, just sleep in a head to foot arrangement so you don;t have to worry about waking up face to face to someone. Â It also helps to bring along earplugs in the event someone snores.