I think Frontier itself did not like the idea of the docking device anymore. They probably only introduced it in Elite Dangerous because it was a real classic in the classic Elite games.
But this time, the docking computer became limited. Back in 1984 it was able to take over control 20 km away from starport. And it worked without that many issues as seen today!
But this time, the docking computer became limited. Back in 1984 it was able to take over control 20 km away from starport. And it worked without that many issues as seen today!