I'd say 60 years. As you implied one can't just dismiss the heartbreaking necessity of the CuRev

Even after considering the alternate pathway called ROC[tm]-- after all you may argue Morris Chang et al gave up lifestyles-- & I hear Rationalistic Daoism is having a resurgence on the mainland (vs Confucianism)--

  Because (sadly) it's all still about morale & spiritual