I believe the "bootcamp followed by effective indenture" model has been widely favored among the regional airlines that act as feeders for the big players, dati

I believe the "bootcamp followed by effective indenture" model has been widely favored among the regional airlines that act as feeders for the big players, dating back well before the software industry first happened upon it. If I recall correctly, Patrick "Ask the Pilot" Smith has had some things to say based on his own experience here. In any case, whether or not that model is actively used today, I would be entirely unsurprised to see it spread widely in the next couple of decades, and maybe not only in the airline industry.