The scalability trilemma states that a blockchain can only have two out the following three properties: decentralization, scalability, and security.

Layer 2 protocols aim to make Ethereum more scalable by not always interacting with the root chain. What are the potential drawbacks of layer 2 solutions? It seems to me that by not creating transactions on the root chain you sacrifice auditability, which might be critical for some applications.

  • I came here with the same question and didn't find any of the answers satisfactory. Everyone is trying to say L2 is pointless.
    – sudo
    Mar 24, 2022 at 3:54

3 Answers 3


most epic drawback is : data unavailability on layer 1(main chain on ethereum) which leads to another epic drawback which is being unsecure of funds located on child chain


What are the potential drawbacks of layer 2 solutions?

Layer twos really do not solve any fundamental problems. Instead, they are a duct-tape solution on the existing Ethereumn L1. There is no other reason, besides the stickiness and network effects of Ethereum L1 ecosystem, which would prefer L2s over better L1s. L2s just give the existing L1 tokens a a bit better place to live with more secure bridge and do not offer anything what better L1 does not.

More about scaling issues in this blog post of mine.


A price paid for scalability is another drawback. Since L2 need to store data on L1 it is still expensive to use it comparing to other scaling solutions such as sidechains connected by bridges to L1 (BSC, Polygon, Fantom, xDai, and others). Meanwhile, those sidechains can drastically decrease price of L2 settlement by running L2s connected to sidechains.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.