but again, kinda off topic again what we've gone over
Bad = EE, UUM, arrays, windmills, watermills, and scrap boxes (in mass quantities)
Good = nothing
god this is hard............
but now we need to discuss 2 of the most major problems. Scarcity and specialization.
with minecraft, all ores are everywhere and plentiful, so ore trading is going to be quite difficult (although that chart was helpful). but i have heard of this one weird mod. ores are very hard to find, although they come in massive scattered veins that take 3-4 days (game) to mine. they are the same kind. and the ores are not always seen, so you have to dig around (like real miners). another is that ores are biome specific, and the nether is banned. iron might only be found in jungle (random example), or glow stone in mushroom biomes. but then there is the fact that biomes are the size of pixels,so thats another problem. and about specialization, that is a problem with solutions that have their own problems. i have heard one solution is some plugin that forces specialties on people (miners can't chop trees, lumberjacks can't mine, etc.) but that can cause people to get really annoyed and want to leave. not bother, and you have BIG problems, people will not bother to trade, opening a successful business has about as much chance as winning the maximum prize on a 1$ scratch ticket. so now what?