Something that surprises me is that using - or not using - the little finger in active work on the keyboard seems to have troubled players of the English system a lot since 1850s while using it ( at least now and then) by Anglo or Duet players to my knowledge is not that controversial

Is there any Anglo or Duet player here who absolutely detests using the little finger? And are there some who "can not live" without doing so ?
Motivations for either case please !?