An escalator that is constantly running, however, should be like a Shabbbat elevator.
Which many, if not the vast majority of, poskim say should not be used unless in case of great need.
Maybe even easier as everyone sees that it is constantly running.
Most Shabbos elevators I’ve seen have a clear sign that they are Shabbos Elevators, so I don’t think they are any worse regarding maris ayin.
As you seem to agree, Avi, we can’t get out of the zilzul Shabbos issue, no matter which technology is employed.