I switched from KDE with almost what you mentioned: Workspace 1 had a fullscreen terminal with zellij, Workspace 2 had a browser, workspace 3 had two chat apps open and that was it. Bindings to switch between those. I switched to niri because it was different and more lightweight than a full plasma setup at first, but now adapted my workflow a bit. Most of the time, the individual windows I have are screen-sized still, similarly organized: 1 has development, 2 has browser(s) and occasionally my email reader, 3 has my chat apps. I open new terminal windows more frequently for just firing a few commands or starting some long-running thing that I need to look at from time to time. With KDE, I had these windows in the background, now I have them side-by-side on "1". "Alt-Tab"ing between them in retrospective feels clunky now compared to Super-hjkl'ing through the windows... YMMV of course, but I think my workflow got "lighter" because of that, no more "windows over eachother" but rather "next to eachother" ... gives a feeling of lightness to me.