A Taproot-native (re-)bindable transaction bundle proposal

The dialogue among developers in the Bitcoin Development Mailing List highlights a critical discourse on the approach to proposing and integrating new features into Bitcoin's protocol, particularly focusing on tapscript enhancements. The conversation underscores the importance of rigorous safety and cost-efficiency evaluations for any proposed changes. It is noted that considerable effort has been invested in designing tapscript to facilitate the addition of opcodes more safely and straightforwardly. However, there appears to be a concern regarding the lack of advocacy from proposal authors about these improvements, raising questions about their relevance or awareness.

Another point of contention involves the complexities introduced by supporting certain features across multiple facets of the technology. The argument suggests that such an approach not only complicates the system but may also bypass the benefits brought about by tapscript modifications aimed at streamlining safety analysis processes. This complexity is not outright dismissed as unnecessary; rather, it calls for a well-founded, non-speculative justification, especially when considering novel implementations or the integration with existing technologies like HSMs (Hardware Security Modules) and schnorr signatures.

Furthermore, there's a specific interest in understanding claims regarding the interaction between HSMs, schnorr signatures, and other components such as CTV (CheckTemplateVerify), where signature mechanisms might differ. The inquiry seeks clarification on who is making these claims, which products are involved, and how these interactions manifest, pointing towards a need for a deeper exploration of how new technologies coalesce with established protocols without undermining the security or integrity of the system. This discussion is part of ongoing conversations within the Bitcoin Development community, reflecting the group's commitment to scrutinizing and vetting technological advancements meticulously.