What Is the Primary Difference between Bitcoin’s Block Size Limit and Ethereum’s Gas Limit?
Bitcoin enforces a hard cap on the block size (historically 1MB, now measured by 'weight'), limiting the physical data size. Ethereum enforces a 'Gas Limit' per block, which limits the total computational work (Gas) that can be included.
Bitcoin limits physical size; Ethereum limits execution complexity. Both mechanisms manage block space scarcity and network load.