As it is, the article is a bit confusing because it's the third one in the series just focusing on NetBSD. The original one[0] offers a better context, especially this bit:

> The idea is to create reverse proxies with local caching. These proxies would cache the content on the first request and serve it directly afterward. The proxies would be distributed across different regions, and the DNS would route requests to the nearest proxy based on the caller’s location. All this is achieved without relying on external CDNs, using self-managed tools instead.

[0] https://it-notes.dragas.net/2024/08/26/building-a-self-hoste...