Yes technical faults can happen or it might be physically impossible to keep the heading (because the engines are too weak to counter the wind). But still, the

Yes technical faults can happen or it might be physically impossible to keep the heading (because the engines are too weak to counter the wind). But still, the autopilot delivers what it promises and it is certified for. You can (or are supposed to) take your hands from the yoke when it is activated. The cruise control is much more an autopilot than the lane assist, which is just an assist but wrongly advertised.