I am not talking about a $5 model airplane servo. I am talking about a linear or rotary actuator. And they are not heavy or expensive. The robotics world is full of this stuff. There are some high end model airplane servos that would work for some applications but not for a large amount of area under a large load unbalanced. The DIY CNC world has come a long way due to advances in robotics. The stuff exists. The example of model airplanes is an example where long control runs have been replaced with putting actuators at the control surface. It is done because it is less complex, lighter, more accurate input to output and gives a tone of flexibility in setting up mixed control scenarios. It has been that way for decades now. If you are after that complexity it makes sense. Almost all of my designs could benefit from and are limited by the mechanical solutions for those complexity decisions. I don't think I need to rethink my thinking. If it was better to build complex mechanical systems that would be the trend line in every industry. It is not. If you are happy with a simple cable then this discussion really doesn't apply to you. Electrical systems if designed properly have been proven at this point to be more reliable in systems with added complexity in almost every industry and application you can think of including aviation.