Different Blockchains Explained

The blockchain trilemma says a simple design can only fully achieve two of three properties. Which three?

• Speed, price and popularity
• Security, decentralization and scalability
• Privacy, fees and finality

An app runs on a rollup that posts its data to Ethereum and is rated Stage 1 by L2BEAT. What does that tell you?

• It is exactly as safe as Ethereum's base chain
• It leans on Ethereum for data, but its operators still have some "training wheels" powers
• It has nothing to do with Ethereum's security