Please note that 'each' is fundamentally different from 'xargs'.

  echo 1 2 3 | each "rm {}"

is the same as

  rm 1
  rm 2
  rm 3

while

  echo 1 2 3 | xargs rm

is the same as

  rm 1 2 3

I would rather say that 'each' replaces (certain uses of) 'for':

  for i in 1 2 3; do rm $i; done