I know that we’ve gone round and round on this topic, but I remain convinced that the M20 line would be viable today if there was demand for it. If Mooney had firm orders for 2-300 airframes, they could negotiate various discounts on components, and if there was a consistent backlog of orders, they could certainly find efficiencies in manufacturing.
It’s not the case that a metal airframe is impossible to make money on. As mentioned, Cessna failed with the Columbia line, and they’ve succeeded on the old metal type certificates.
And to be honest, if Mooney were able to *sell* hundreds of airframes, there would be plenty of other companies happy to build them. It’s a sales problem, I’m convinced - not a manufacturing one.