Why was the multi image technique abandoned?

The Boston Strangler uses a multi image technigue to an extent that doesn't seem to have occurred before or after this film. The picture below shows an example of this:




I found this very enjoyable and particularly liked the fact that it allowed me some control in how I viewed the film as I could choose to look at some images over others and choose the order. This method also allows for some really great options no other method can achieve:

You can see the front and back of a subject at the same time
You can see a distant and close up of the same scene at the same time
You can view totally different scenes at the same time

This film also has another remarkable effect: when Henry Fonda interviews Tony Curtis they are in a interrogation room a certain distance apart and in different postures. As Curtis goes back into his memories we are transported to the room he remembers and both he and Fonda are in the same positions and postures- Fonda enters his memories. I thought this visual trick wasn't developed until after 2000. 

Why was the multi image technique mostly abandoned? I thought that it had great possibilities. 

BTW- here is a link to an article where the director and camera people share how they approached this method of filming. It's a great read if you are into the thinking process and technical issues.

ascmag.com/articles/multiple-image-technique-for-the-boston-strangler