two weeks ago i didn’t know what event sourcing was and now i see it everywhere

Event sourcing is an architectural pattern that stores application state changes as a sequence of immutable events rather than just persisting the current state, enabling a complete audit trail and ability to reconstruct any past state. The post likely reflects the Baader-Meinhof phenomenon (frequency illusion) where once someone learns about a concept, they suddenly notice it mentioned frequently across software design discussions and technical literature.

Source: Yohei Nakajima (X) | 2026-05-28