Earlier quoted context omitted.
> Sway is absolutely incredible, it puts macOS, built by Apple's army of engineers and dump trucks of money to shame in its simplicity, stability, and efficiency. They have different design goals. A tiling window manager is not a good default for everyone or every device type or screen size.
I could equally state that overlapping windows are not a good default for everyone or every device type. It's also worth pointing out that Apples newest UI, iOS, uses a tiling window manager.
Also, mobile OSes won't really ever have more than 2-3 windows shown at the same time, since the screens are so small. That will probably change once we have folding devices or AR/VR. But super limited "tiling" window managers do make sense with such limited UIs.