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This is my new tweak:

(defun open-line-above-and-indent ()
"Insert a new line above the current one maintaining the indentation."
(interactive)
(let ((current-indentation (current-indentation)))
(beginning-of-line)
(open-line 1)
(when (> current-indentation 0)
(indent-to current-indentation))))

(global-set-key (kbd "C-S-o") #'open-line-above-and-indent)

#emacs is great!