Am I the only person with vehicles to wrench, a house to work on, chickens in the yard... as well as open source projects? If I'm not getting paid, I still have plenty to do which feeds me to today or prepares me for tomorrow.

Cache la poudre.

There definitely are still a lot of things outside the market economy. People caring for their own kids is an enormous one. I'm not trying to make a claim about how much bigger the economy is of today's GDP, just that this has changed a lot over time in a more market direction. Which then means if you're trying to put historical numbers in perspective you need to adjust.