What I understand the OP to be suggesting; cut "traditional" teachers to 1-2 specialists in each department. Give all students lessons with these specialists however often the timetable allows. The rest of the time, stick them on a computer with an adult to supervise. I know I am taking your suggestion to the extreme, but this is where it would eventually lead. It may be inevitable, but there are some of us that want to fight this, for all the reasons already given already. The teacher shortage is a symptom. Trying to manage it or cope with it is wrong. We need to attack the cause.