Oh and when I DM'd I just translated this for people. If the orc has an ac of -3 and you have a thac0 of 12 then you need a 15. So your roll plus modifiers. I guess the problem would come if someone always thought "I need to roll 12, right?"
And I agree advantage is sooo much easier for new players but it also sooo much more powerful than your standard buff and there so many ways to get advantage . . .
But anyway, the days of Thac0 are gone. (until WotC lets us have 2nd ed srd)
