I would like for the preview window to exist separately from the Aseprite program window so that it may be placed outside of the work space, for example on a different monitor. Currently, the preview window is contained within the boundaries of the program window and clips when moved to the edge of the window. I assume this is related to https://github.com/aseprite/aseprite/issues/518 (Which was updated in 2018?)
The preview window takes up a lot of space in the program window when used at an appropriate size. Allowing it to be placed outside the Aseprite window would help with workspace clutter. The unrestricted preview window can also be easily recorded to create footage of creating artwork without including the workspace elements and frequent zooming in/out common to pixel art workflows.