Yes, we have made workers more efficient. We have not had the technology to create with no workers until now. Google F150 assembly line and watch how much of the truck is assembled without a human even appearing. And 3D printer technology is going to get better. Some car companies are starting to 3D print components at the assembly plant. That means no workers making the part and no shipping of the part. Even into the 60s and 70s, factory work required expertise. Now many positions involve watching the machine work. Companies are not going to pay $30/hour for that.
15 years is a very very long time in technology. I have no idea why you think self driving is impossible in that time. Most companies are banking on LIDAR (not Tesla) and LIDAR has had issues. But as can be expected, new and improved LIDAR is on its way. I am not sure Tesla has the right idea with its passive system, but time will yell.
bulldozers, cars, trucks, motors, cranes, and many other things allow one man or woman to do the work of a hundred, and a zillion other things implemented before 1980 allow one person the do the work of 10 to 100 men.
a train did the work of how many?
or a giant cargo ship.
tv and radio enabled a a very few to market to millions, entertain millions, and educate millions.
sorry, the "this is all new and more pervasive" thing just isn't so, so just stop with the propaganda.
those 3d printers need manufactured and operated and serviced, and materials to shape and form.
the tech enabled drop in men needed to produce goods, is offset by the increase in number of goods produced.
robots need built and operated and maintained as well.
same with printers.
and if robots are so much more cost effective, why aren't the prices of cars and other goods dropping like a rock??
fast food will always employ workers. (remember when the automat was going to take over food service).
tech advances the equal of or greater than those you bring up have been a constant throughout history, and all have enabled one worker to do the work of many, to hundreds, to thousands, of workers, yet wages and jobs continued to rise.
then that near constant increase stopped, when the moneyed interests bought govt, the politicians, the regulators, and the courts, and moved the industries and jobs and tax bases off shore, and killed the worker's ability to bargain for a share of the productivity gains.
the new factor in the loss of jobs and real wages wasn't tech. tech advances were always a constant that previously created more jobs than it ate, and allowed workers to bargain for ever increasing wages without increasing the cost of production.
it was the purchase of govt and the subsequent off shoring that was the new factor that killed jobs and stagnated wages.
you can keep repeating the false propaganda lie that tech is the villain here, but the entire history of the world says differently.