Engines appear to be off on all ships while in supercruise. I liked it more when they were glowing. At some point FD decided to turn them off. I understand that you don't use thrusters in supercruise and it is your FSD that does the job, but why then do you crash out of supercruise everytime you try to disable the thrusters? Would have been so nice for heat management with dirty thrusters especially.