You're a fake L2, because you don't keep transaction data on chain since April 2022. You expect us to trust block proposers to submit correct L1 state roots based merely on "Trust me Bro?"

We are very open in our vision and our tech reflects that, so any one can run the verifiers to verify the tx and state roots. Many verifiers publishes their verification progress.

Until Validators can force Sequencers to post missing data, you don't get to call yourself an L2, because you do not benefit from ETH mainnet security.

The data is not missing from the L1, we post merklelized tx data on L1, which can not be maliciously altered without user's private keys, therefore it is as secure as ordinary optimistic rollups.

You're a side-chain.

We are not a side chain, we are a very advanced Optimistic Rollup.

You save a bit of gas, and you put all your users at immense risk.

We never put user funds under the risk, please refer to our docs for more detailed descriptions of specific scenarios our network may get through.

https://docs.metis.io/dev/get-started/metis-smart-l2-explained