[stouset]

There’s still a second mechanical release so this is strictly more complicated than simply having a mechanical system to begin with.

[eptcyka]

Routing the mechanical linkage to a place in the door that would make sense for a door handle to be is the difficult and expensive part.

[davrosthedalek]

Bowden cables are dirt cheap.

[eptcyka]

The cables are cheap, designing a door latch system to be easy to install/cheap to manufacture is not. Why do you think all parking brakes on all ICE vehicles have turned electric now?

[newaccount74]

Probably because forgetting to pull the handbrake is a very common cause of accidents?