I’ve got basically the bspwm workflow, but on KDE.

So, bspwm has tiling of windows and doesn’t want you to minimize (nowadays, it actually has a minimize-feature, but back when I last used it, it didn’t). As a result, if a window is open, it is visible on some workspace. If you want to hide windows, put them on a different workspace.
I like that workflow, because while it probably seems complex when you first hear about it, it actually simplifies things. When you’re looking for a window, you don’t have to check all the workspaces and minimized windows and behind other windows.

KDE adds to that, in that I can have a workspace overview in my panel, so where I can see all workspaces with the windows that are visible on them (which with this workflow is all windows on that workspace). I like to call it my minimap.
It makes the workflow a lot easier to use, but it also allows me to group workspaces by location. So, if I’m working on a topic, I often have a Firefox window on one workspace, my text editor on the workspace below and then a terminal on the workspace below that. If I then realize, I need to quickly look up something for a related topic, I’ll open up a new Firefox window two workspaces below that (leaving an empty workspace as separator). If I do something completely different, I might leave a whole bunch of empty workspaces in between. Or, well, KDE actually allows grouping workspaces with a feature called “Activities”, so I’ll often switch Activities.

I find that works a lot better for multi-tasking than the traditional Windows workflow of one window per application, with all kinds of different topics mixed into all kinds of ungrouped windows. If I switch between topics, I just go to the right location on my minimap and I’ve all the topic-related information in the windows that are there.