workspacer VS PaperWM

The topbar is part of workspacer just heavily customized you can get it here: https://workspacer.org

I will definitely give this a try. Have you used Workspacer?

I usually only watch one stream at a time but the few times I have had two open I just kept a single chat open. Pressing the + next to options when you have a tab open lets you open another side by side, no idea if there's any way to drag and drop a tab there though. More generally for window management I use https://workspacer.org on windows and have filters to automatically open chatterino and mpv on the same workspace with a 20-80 split.

https://workspacer.org/ (might need some coding experience)

FancyZones in power toys and https://workspacer.org/ (not tried it personally)

For Windows, the situation is even worse. While I was forced to use Windows at work, I used workspacer for a while. That was better than no tiling but still a huge pain to use (flickering on every key press in some programs, called "epilepsy mode" by my colleagues; slow startup; restart or crash every time the display configuration was changed; almost no documentation or ability to customize it). All other tiling window managers for Windows were even worse, some not starting at all, being incompatible with Windows 10, or not supporting multiple displays.

But with auto-tiling you need to place windows according to a pre-set configuration, it needs to fit whatever layout you want to go for and it needs to be able to resize the window without breaking the content. This works pretty well for libadwaita apps, but a lot of webapps seem to assume a certain minimum window size. Another issue is how to handle modal dialogues, where paperwm for example sets an override to ensure they're not attached to the main window. Should the settings window then be treated as a separate window and tiled, or should it be left floating above all others?

I like Gnome's simplicity, agree with most of its deviations from the tired old Windowsy desktop status quo, and am very happy to depend on all its great integration work. I can't quite live with the simplistic window management, but extensions cover that (as they do much else). With Fedora + Gnome + PaperWM, I'm quite at peace with the current linux desktop situation.

Still I'm looking forward for something like PaperWM to be possible in KDE - or even to write it by myself

I have noticed in one of your comments in this thread that you are looking for novel ideas of the UI look. As others commenters stated, you might be interested in tiling window managers like i3 [0] or sway [1]. They are truly a gem for productivity and sometimes for an eye [2].

However, I love the concept of scrollable window manager like PaperWM [3] is. When I had a smaller screen (24" 16:9) I was complaining a lot on unused space on my screen. With PaperWM I was finally happy with its dimensions, because I could have huge IDE on the left and small part of terminal displayed on the right. That way I knew if something was printed to terminal, while my editor took 80% of the screen.

[0]: https://i3wm.org/

[1]: https://swaywm.org/

[2]: https://www.reddit.com/r/unixporn/

[3]: https://github.com/paperwm/PaperWM

If you want something really different, give PaperWM a shot.

You may want to try PaperWM (GNOME extension) https://github.com/paperwm/PaperWM