You say "post-scarcity" like it's an inevitable scenario. Resources are finite. Energy is finite. Exponential growth doesn't last forever.

> Energy is finite.

With enough renewable energy from the sun, there is very little we're constrained by

http://www.sandia.gov/~jytsao/Solar%20FAQs.pdf

"All together, the technical potentials can be estimated to be: Solar electricity: 89,000 TWc · (1-0.708) · (1-0.0345) · (0.3) = 7,500 TWc Solar fuels: 89,000 TWc · (1-0.708) · (1-0.0345) · (0.1) = 2,500 TWc Solar thermal: 89,000 TWc · (1-0.708) · (1-0.0345) · (0.225) = 5,600 TWc

These are huge potentials, dwarfing by many orders of magnitude those of the other."

Extend past a few decades and you're beyond the lifetime of the black box, sadly. It would be really frustrating to finally find the plane only to never actually find out what happened.