You don't need an open office for the team to work in the same space. A team room is not a gigantic open office. It's a big room with walls. I loved working in

You don't need an open office for the team to work in the same space. A team room is not a gigantic open office. It's a big room with walls. I loved working in a teamroom. I get instant awareness what everyone else is doing in my team - the actual claimed benefit of an open office - with no downsides. An open office has several teams and one is forced to be aware of their doings as well.