Engineers arent sitting around in our place while the aircraft are flying. usually one or two on maintenance of some kind while others are working the line. not much time to be watching telemetry.
Since the oil/helicopter companies dont like paying for engineers as it is im not sure whos going to stump up for the extra people to expand the hums/telemetry dept.
shame though because its great those examples of detroit diesel and Caterpillar and also some luxury car makers do that too.