Well to be fair pasting a multi-line selection is the only use case I though of that would cause issues, so if it still behaves as it does now it's probably fine.
@b4n, agreed, so I tried it, and the post was to say, I tried it quickly (changing the line @AdamDanischewski did) and found multi-pasting a rectangular clipboard content works as it does now.
it's funny to see you supporting hard-coding a new default :)
@b4n As was said on one of the plethora of issues on this topic, an option is not a good UX for something like this, you are not going to copy to the clipboard, remember to go change an option, then come back and paste, thats why I was saying make two separate paste commands, paste single and paste multiple, but in the end the _pragmatic_ solution was just to click to remove the rectangular selection if you only want to paste single.