Even Windows has had a basic level of built-in window tiling functionality for a decade now. You can resize windows to half or a quarter of the screen either with keyboard shortcuts or dragging the window to a side or corner. It works pretty well.
I switch between i3 at home and windows at work and that’s one of the things I really miss
Another thing I miss is having a detached window permanently on top
Dragging the center divider doesn’t work in my use case (detached eclipse console window on one side) I have to resize both windows manually
to be clear: it works as expected with two browser windows, it’s the type of window eclipse creates when you detach a view that windows doesn’t seem to like