Lamport signatures and other CAT tricks

The script in question, despite the potential introduction of CAT via a soft-fork, is fundamentally not feasible for execution within the Bitcoin network. The sender expresses this sentiment with a sense of disappointment, as indicated by the use of an emoticon that conveys sadness.

Although brief, the email suggests a significant challenge for developers attempting to innovate on the Bitcoin platform, pointing to inherent constraints that may impede certain types of advancements or modifications. It underscores the complexities involved in adapting Bitcoin's protocol to accommodate new features or tools and indicates that some ideas may not be technically viable under the current system architecture.