Emergence of eukaryotes specifically entailed aerobic respiration of the mitochondria, which was a massive increase of chemical energy (when glucose and oxygen are present).
Chloroplasts enabled direct harvest of photons from our parent star.
We are actually older than the plants.
These are going to leave a signature in the gas of an exoplanet, if they happen.
Was it this billion years or that billion years
probability of our experience matching another planet’s experience in the same time frame is low