is this a good amount of not overwhelming the system? e.g. they recommend 60 days? https://letsencrypt.org/2015/11/09/why-90-days https://letsencrypt.org/2015/1

is this a good amount of not overwhelming the system? e.g. they recommend 60 days? https://letsencrypt.org/2015/11/09/why-90-days https://letsencrypt.org/2015/11/09/why-90-days - and folks say the bot process won't let you do it unless it's within 30 days of expiring? (but this might not be limited by the server-side API, because --force-renewal exists)