OS windows are a hindrance for any workflow needing semi-permanent layout. It's ok to place two or three monolithic apps side by side, and maybe to pull apart separate working sessions at different virtual spaces. It also requires constant bookkeping to clean up all the individual windows you no longer need.

That's very different from a spatial layout, where you can juxtapose related code elements near each other, and they remain in those places for as long as you're using them, and then get rid of all them together by closing their common container.

There have been attempts to create new, more spatial work styles on window managers, but the industry is too set in their ways on how windows should be managed, and WMs are complex beasts with many moving parts. So it's usually better to keep those experimental tools self-contained within their own window or app.