Ideally the manager would have windows and containers. Containers can be nested and can be floating windows, splits and tabs. There is no reason why tabs inside

Ideally the manager would have windows and containers. Containers can be nested and can be floating windows, splits and tabs. There is no reason why tabs inside a window should belong to one application. All that being said, navigation in such a structure would be a mess that would need a lot of learning. Also I’m sure a window manager like this already exists somewhere. A system wide search within tabs would help more maybe. Like chrome’s cmd+A but for all tabs everywhere