Why is anything supposed to be sustainable for a ~50-year career? That’s a long time! Things change and people change.

It’s not like my great grandparents had a passion for farming in South Dakota and that’s why they did it until they dropped dead. It’s all they knew and what they did to survive.

If you gave them the option to tap on a keyboard in an air-conditioned room for 10 or 20 of those years they would’ve taken it.