kind of stupid thread name. I just came up with idea of.. idk magma extractor, that pump lava from below bedrock and then cools it down to metals etc or maybe just void particle generator, that generates eu when close to bedrock at constant small rate similar to solar panels. its not the point.
The idea is to make location dependant machine which requires, lets say 3x3 flat bedrock underneath it or 2x2 flat bedrock underneath it at depth 2, which is pretty hard to find.
also there could be some machines which work only in nether (some depth mining maybe or heat related)
and in the End some cosmic-space related.
that would encourage players to explore and have vast inter-dimesional or even multi-dimensional production lines.