I think (work)spaces like macOS Spaces because they make access easier; with a single continuous space you have to work, whereas a workspace is a hotkey away. They make for nice demos and movie scenes though.

After having used such things since the 80s (starting with DESQview) I find myself simply minimizing or leaving secondary applications in the background of a single workspace. When I do use other spaces it is for full screen view. I don't usually need to see multiple windows at the same time, but that would be a task for a tiling manager...