Blender option that it opens in the same screen as before

On the Windows platform Blender should open on the same monitors, and in the same sizes and positions, as they are in your startup file. I can move and size multiple Blender windows all over my multiple monitors, then "Save Startup File" and they will all be exactly there the next time I launch Blender. I think the only exception is for single Blender windows that are larger than a single monitor and therefore spanning multiples.

This doesn't currently work the same on MacOS because we don't yet have the necessary code in place. And not sure if it is possible on Linux, fairly certain not on Wayland.

Not sure if this should be handled by Blender or the OS. On macOS this is handled by the operating system. Perhaps your OS has a similar feature?

just tested it, never realized this, very annoying, upvoted

just how many screens do you have? I've personally never worked with one instance blender having more than 2 windows at a time. plus we already have a great system for saving layouts anyway.

the only thing I dislike is that blender always opens in my secondary display. logically, it should at least open in the main display or the screen you launched it from.