The wheel is a 4000 year old technology and is still being used. You don't hear the same people complaining about the stock turbos being WWII technology, do you? Don't listen to people who have no idea what they are talking about and just repeat what they heard.
The Greddy/Mitsubishi turbos are tough and can make tons of power with correct supporting mods. The ball-bearing turbos are not magic turbos.