I brought up the past model to show that apprenticeships in the past worked for a specific reason. Various models of apprenticeship/training/education fail today, because we have rejected what made them work in the past. We don't want / can't have a system where young people are completely under the control of an apprentice master for several years, unable to change jobs or live where they want. This is probably a good thing. But without it, the idea of apprenticeships makes little sense.