I fee this would be really easy to implement this for things like planes that have multiple engines things like "on beam break disable engine 1" "on beam break disable engine 2" would be simple to implement but could be very valuable to planes also a direct connection to something rotating rather than it having to go through a transmission would be nice Im sure more in-depth engine simulation is coming and I think these features would be useful when more simulation comes
This will benefit electricity-powered performance cars and hybrid cars too Also, add in the option to force set the engine / gearbox to only power a certain axle, just like some 4WD hybrids do in real life.