I never understood the appeal of tiling as 99% of the time I am focused on a single window at a time and I want it to take the full height of my display, so scrolling with the focused window centered is my ideal workflow.
I only wish I had the ability to quickly toggle the side-by-side mode that is default with these for the occasional time I need to have a code editor next to my browser.
If anyone knows if any of these supports that toggle, while also supporting the other key features I use in karousel (being able to shrink/expand the focused window with a hotkey), then I'd be willing to leave KDE to get that perfect workflow.