I'd argue establishing boundaries is a part of securing a system. Containers by themselves are not a guarantee of security, but they are definitely a component. Namespaces, seccomp, landlock, firewall rules, DNS allowlisting, etc. Also, to be blunt, there's a lot to be learned by an intro like that.
![This image is a line graph titled **"GitHub Average Uptime by Month"** covering a period from April 2016 to early 2026. A subtitle notes that "Codespaces and Copilot [are] excluded due to launch partway through dataset."
The graph tracks availability percentages, with the y-axis ranging from **99.500%** to **100.000%**.
### Visual Overview
* **The Line:** The data is plotted as a continuous line with colored dots at each monthly data point.
* **The Trend:** * From **2016 to late 2018**, the line is almost perfectly flat at the **100.000%** mark, colored primarily in green.
* Following a vertical dashed line labeled **"Microsoft Acquires GitHub"** (dated late 2018), the line becomes significantly more volatile.
* From **2019 through 2026**, the line shows frequent, jagged drops, with several "dips" falling between **99.600%** and **99.800%**.
* **Color Coding:** * **Green dots** indicate months with 100% or near-100% uptime.
* **Yellow and Red dots/lines** are used for the more volatile period post-2019, highlighting the decrease in stability.
### Key Milestones
* **Pre-Acquisition (2016 – Oct 2018):** Stability is represented as a consistent green line at the top of the chart.
* **Post-Acquisition (Oct 2018 – 2026):** The graph shows a marked increase in downtime incidents. The lowest point on the graph occurs around **early 2023**, where uptime briefly drops near **99.500%**.
* **Recent Data:** The volatility continues through the end of the chart in **early 2026**, showing frequent fluctuations between 99.8% and 99.95%.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ckaz32jwl6t2cno6fmuw2nhn/bafkreidftteoxqihnw7sqaopu2bbfe4ycyyq7yzubnp5timg75htuxztmu)
