The instability started well before vibecoding, in around 2018-2019, shortly after the Microsoft acquisition.
This gets posted every time GitHub is down. This chart is not accurate. It is based on data scraped from GitHub's status page and that data is missing historical incidents from the pre-Microsoft era.
Yeah, it’s not even consistent with their own incident history. I spot checked it and consistently found incidents with downtime/elevated error rates in months listed as 100.00000% uptime on that chart.
The unofficial and offical charts are both lying. The GitHub one ignores actual outages and the unofficial ones count minor display bugs in minor features as a “github outage”.
The unofficial one has done that for years though so it’s useful for comparison. If you go back a few years it was regularly at 99.9% uptime.