In fairness Tesla tried outsourcing everything with the Roadster. However it didn't quite work out too well and, even though the problems were addressed, the lesson learned was that vertical integration was the way forward.

Parts are outsourced still, the Falcon Wing Doors are outsourced to a supplier and plenty of components (e.g tyres) obviously just get bought in.

Essentially the lesson learned from starting with 'outsource everything' and moving to vertical integration has helped lead to this. Shareholders could bear in mind that outsourcing has been tried.