I appreciate the engineer's frustration, and do have some understanding of the demands of modern manufacturing. But it might be prudent to point out that Henry designed the T specifically for the engine and transmission to be removed easily- to allow them to power America's farms. (pumps, wood mills, etc.)
I had thought the auto industry was going to shift to a modular design platform, fly-by-wire. The body shell would lift off easily ( with the proper equipment ) and the drivetrain would be completely exposed to facilitate maintenance.

Instead, cars are evolving the other direction, with the drivetrain and body heavily integrated and therefore more difficult to maintenance.