Transportation provides an interesting mental model for thinking about components of crypto: Blockchains are roads Wallets are cars Dapps are often the destination Blockchains as roads Some blockchains are more congested than others. Transactions per second, blockspace, and congestion remind me of car traffic. Some road systems deal with traffic better than others. Safety concerns might differ, tolls might be more expensive on one roadway vs. another, and not all cars may work well on all roads.