Everyone(Who is not a professional game dev yet) has their own projects because they feel more control and freedom working on their own project. As a result we all have 30 unfinished projects and that’s it.

I once found someone interested in starting a project together but he lost interest within a week.

It’s been a bit, but when doing game jams I shuffled working alone and working as a team. It seems duos are the best options for me, but solo is okay. It’s just solo I get a little bit bogged down into doing the art and making it look nice instead of letting things be ugly first. If I’m working with an artist, things seem to go smoother because I can work on programming. 3 - 4 people on a very small game is too much, but obviously this is just jams and not something larger.