Dwarf fortress is the first thing since MUDing that's really scratched the imagination itch in quite that way and, as someone who has worked in game development themselves, I think it's something that is only possible if you keep to the lowest tech. If you use words or abstract symbols then each player will fill in the details themselves, usually in their head but sometimes in artwork (see Kruggsmash as an approachable example here[1]) which can be extremely fulfilling.
I hope to see the non-ASCII version work as a gateway drug to get more people into the imagination of what they're building. And I hope this didn't come off as ranty or judgemental - each person enjoys games in different ways... but low detail art has a way of really spurring the imagination on!