A naive implementation of property list merge

kvplist-merge

(defun* kvplist-merge (&rest plists)
  "Merge the 2nd and subsequent plists into the first, clobbering values set by lists to the left."
  (let ((result (car plists))
        (plists (cdr plists)))
    (loop for plist in plists do
          (loop for (key val) on plist by 'cddr do
                (setq result (plist-put result key val))))
    result))