GDP per capita and even GDP per capita adjusted for PPP is also misleading because it uses the wrong basket of goods: focusing on things that dont matter.
People forget, wealth is not money. Wealth is the things you buy with money. Wealth is when you can afford the essentials of life: Shelter, food, water, medical insurance, education and transportation (with the costliest ones being Shelter and medical insurance). Consider the number of working hours the average person needs to expend to afford shelter and compare that to 500 years ago. I think you'll find that there hasn't been much improvement. In fact, in CA and bay area, I think you'll see that we're working even longer hours to afford basic shelter than 100s of years ago.