Actually, no: the default 90-day certificate lifetime was chosen such that it wouldn't be too inconvenient for manual renewal if necessary, but was intended to

Actually, no: the default 90-day certificate lifetime was chosen such that it wouldn't be too inconvenient for manual renewal if necessary, but was intended to encourage automatic renewal: https://letsencrypt.org/2015/11/09/why-90-days.html https://letsencrypt.org/2015/11/09/why-90-days.html