That's even forgotten these days. Newbies are going to the actual trading without knowing that they can trade through demo accounts. Well, the exchanges should also advertise this so that the new traders can have an idea on it looks like to trade using a demo account.
That's the sole purpose of it but the majority of the newbies are going quickly with their trades because they think that they don't need it and experience is what they need to have. They have a point but it's most likely that they're going to lose money on their very first try unlike with a demo account, they can make mistakes there and learn from it unlike with actual money. Once they lose, they're actually going to lose that money they have deposited and used for it.