Super cool machine. Super expensive.
If you are a low volume engine manufacturer that might make sense. The total machining time would be very long.
Several machines doing the different jobs speeds up the process. Causes dimensional stack up problems too.
Accuracy is the best justification for these types of machines. The more times you have to set up a part, the more chances to screw up. We have parts that take 5 setups to machine with conventional machines that we do in 1 on the HQR 200. In no time, all things considered, the extra cost of the machine pays for itself.
Rouse