"Lightning achieved a many-to-one mapping of transactions to transactions... But creating even a single UTXO per user is, arguably, not good enough. So there are many proposals out there to achieve even greater scaling by allowing multiple users to share a single UTXO in a self-sovereign way. Again, collapsing another “space” dimension of scaling users into one UTXO."
— Peter Todd

"An argument for doing a consensus cleanup soft-fork first, prior to enabling any new opcodes or other features for new types of L2’s, is that we’d learn more about how willing the wider community is to implement what should be a relatively uncontroversial soft-fork that arguably benefits everyone."
— Peter Todd

Peter Todd has conducted a comprehensive analysis of various Layer 2 covenant proposals and their associated soft forks to evaluate the core concepts, costs, and benefits of each. As Bitcoin moves towards genuine "L2's" for scaling purposes, what are the potential trade-offs and possibilities for its future?

Continuing this thorough analysis, Peter Todd examines Bitcoin's Layer 2 solutions, including soft fork and covenant proposals such as CTV, OP_CAT, and SIGHASH_ANYPREVOUT. What are the trade-offs between these scaling options? How might they affect Bitcoin's future, and which path offers the best balance of innovation and security?

Soft-Fork/Covenant Dependent Layer 2 Review
https://petertodd.org/2024/covenant-dependent-layer-2-review