As someone who had to haul one of these around in elementary school, good riddance! They were annoyingly heavy and difficult to move as a child. I believe part of the reason for their size is that they support full-size Braille paper for creating books. Now that books are created using Braille printers, there's not as much of a need for something so large. I used an older version of the Mountbatten Brailler (
https://mountbattenbrailler.com/) and liked it because it was lighter and easier to carry. I wish there were a smaller version of this, without all the computer features. It would be even better if it had open-source software and freely available schematics.