And immediately find that there are numerous incidents that would show up on the modern status board as an issue but are reported with 100.00000% uptime on that graph.
2018-07-16 17:32:53 - We are investigating reports of elevated error rates.
2018-07-16 17:34:27 - We are investigating reports of service unavailability.
2018-07-16 18:04:38 - We've discovered the issue causing connectivity failures and are remediating.
2018-07-16 18:26:48 - We're monitoring the site as systems recover. Some delays are expected as we process backlogged data.
2018-07-16 18:37:26 - We're continuing to monitor and work on further remediation efforts as the site recovers.
2018-07-16 18:54:21 - The site is stable. We are continuing to monitor and work through follow-up remediation efforts.
And there are other incidents with connection failures or elevated error rates during July 2018, but the linked graph shows "average uptime of all components 100.00000%" during July 2018.
Another from October (that also shows 100.0000% uptime)
2018-10-21 23:09:19 - We are investigating reports of elevated error rates.
2018-10-21 23:13:31 - We are investigating reports of service unavailability.
I’ve been using github pretty much daily since 2010 and I never had a push fail or a repo be unavailable until recently.