I also noticed those orderly, neat little terminal blocks in Germany when I lived there. While they are quite novel, I don't think they'de be as practical as wirenuts, since they only accept at most, a 12 wire- and that would be a tight squeeze, they might be good for light fixtures, etc (which was where I saw them used mostly) but as soon as you are dealing with more than 1 wire in and 1 wire out per block, the usefulness of these things disappears. You couldn't, for example have power coming in to a box, tied to a wire continuing the circuit to another box, and a tail out for whatever device would occupy the box. Any solution you could come up with to accomplish this would take four times the space to realize, compared to a simple wirenut and then there is the issue of making sure those little screws are adequately tight everywhere they are used... And who wants to twirl a screwdriver that small all day? I was really impressed at the novelty of these little blocks myself but after thinking about it a while I understood why they never made much of a splash over here. You can find them in supply houses too.. I believe Ideal makes them or imports them or whatever. An application where I do think these things would shine is automotive DC wiring, or wiring inside any machine cabinet where neatness and tidyness of the wiring was important, the wires were small and circuits were simple, i.e. not requiring many wires to get the job done
