As someone who considers himself technically-inclined, I found it interesting that I could never quite grasp Bluesky’s atproto thingee. This Introduction to Atproto from K-NKSM certainly helps:

Since all AppViews have access to the same data, it’s impossible to gain a competitive advantage by monopolizing data. Therefore, anyone (given they have the money and time) can create a social networking service to compete with Bluesky.