I find that with large forts the "rolling resource shortage" problem is really obnoxious. Things like "oh, my idiots turned all the wood, the wood I needed for beds, into charcoal" get my goat. Actually solving the steel shortage problem is really difficult; ERP is not a bad comparison for that, which is made especially difficult because as your dorfs get better at tasks they get significantly faster. A master armorsmith can kill 100 bars of steel in very short order.
I will admit I have more sophisticated desires / needs, though.
The base game with a wiki, a tileset, and dwarf therapist, will be accessible and fun for the average HN visitor.
The ERP aspect of it is for people who just want to reach that level of gameplay. I don't. I just mass produce my stuff and never run out of goods.