Further to recent news from Binance about Zircuit, I am still wondering why L2s are a so big thing. 

You see, L2s are like express lanes built on top of existing blockchains (L1s). They aim to make transactions faster and cheaper, addressing the scalability issues plaguing L1s like Ethereum. Think of Optimism, Arbitrum, or Polygon – these are all popular L2 solutions.
But it's not all smooth sailing. While L2s hold immense promise, they face challenges like security risks and potential centralization issues. Many L2s rely on a sequencer, a single entity responsible for ordering transactions, raising concerns about bottlenecks and censorship.

Despite these hurdles, I can't help but be excited about the potential of L2s. As technology evolves, they could become the foundation of decentralized applications, sparking a new wave of innovation. Solutions like Zircuit's AI-enabled sequencer could address security and centralization concerns, making L2s a more viable option for the future.

Disclaimer: This is not financial advice. Please do your own research before investing in any cryptocurrency or blockchain project.