(Not that i expect this to actually be implemented or something, but it can be interesting disscussing this)
Seeing the Electrical lighter post it suddenly came to me that the tech tree between Vainilla MC and IC its kinda wonky, so i though "Hey how about we get a middle tier between these machines that instead of using EU, they use Carbon fuels like Coal/Biofuel/CoalFuel and similars?"
The idea would be to add new middle tier machines like macerators/extractors that uses coal or fuels, Kinda like the real life Industrial revolution where machines were powered mostly with coals and similars. Of course new Middle tier Drills and Chainsaws that you must refill using the canning machine would come in handy too.
What do you people think?
(In the end Vainilla minecraft would be the past pre industrial revolution, The new tier would be post industrial revolution and the EU tier we all know and love would be the futuristic minecraft)