Changes to BIP-360 - Pay to Quantum Resistant Hash (P2QRH)

The discussion revolves around the security mechanisms in place for tapscript outputs, particularly how P2QRH safeguards against long-exposure attacks. This protective measure is effective unless the wallet descriptor becomes exposed, highlighting the importance of maintaining confidentiality to ensure security. The choice of Segwit version 3 over version 2 is strategically motivated by the need for efficiency and compatibility with existing payload sizes. Specifically, the utilization of version 3 is preferred due to the requirement that version 2 would necessitate a different payload size to be reused. Given that the payload size in question is exactly 256 bits (hash), adopting a newer version eliminates the need for appending unnecessary bytes to extend it. This approach not only maintains the integrity of the data but also conserves blockchain space by avoiding permanent consumption through extensions. This decision underscores a broader principle in blockchain development: optimizing for both security and efficiency without compromising on either.