Thanks to François Thiré for feedback on early versions of this work.IntroductionData availability sampling is crucial for scaling Ethereum. However, compared to its importance, it receives little research and attention. I believe this is due to a gap in understanding its inner workings and challenges. This post aims to bridge this gap by explaining, in layman's terms:What the data availability problem is.Various solutions to the problem.Why data availability sampling (DAS) is needed.Var...