I think that it could be a case of "if it ain't broke don't fix it".

The desktop paradigm is decades old, and deviating from it would probably elicit negative feedback (as seen in previous attempts by Apple in iPadOS).

> desktop-style floating windows, but without workspaces or window snapping.

In the new Desktop mode on Android, it supports snapping windows as well as multiple desktops/workspaces.

In iPadOS you can snap windows to halves or quadrants.