It's important to take this with a grain of salt. Looking at the fit of the model itself, it seems to be a bit overconfident/overfit to the current configuration of society: https://twitter.com/babeheim/status/1108737930804293632
That seems a pretty devastating critique. The model is so confident it takes hardly any concrete data points that don't match to disprove it. (Note I'm speaking math in that sentence, not English.)