PQC - What is our Goal, Even?

The discussion on the potential deployment and use of P2MR with hybrid Post-Quantum Cryptography (PQC) indicates that it would maintain a similar privacy profile to P2TR prior to Quantum-Day (Q-Day). Importantly, even with the advent of P2MR, the use of BIP340 keys remains nearly as incentivized, suggesting a consensus-driven path forward. Additionally, for those who benefit from key-path spending savings, P2TR addresses will still be viable, though there will be a need to transfer any coins from P2TR addresses to P2MR before Q-Day to avoid losses.

Furthermore, there is an expressed interest in understanding the demographic characteristics of users who reuse Unspent Transaction Output (UTXO) addresses. The migration patterns of these UTXOs are anticipated to vary based on whether they are controlled by exchanges or individual holders. In cases where the UTXOs are not under the control of large entities like exchanges, the reliance on BIP32 rescue protocols could play a crucial role. These protocols are expected to safeguard most end-users who utilize BIP32 wallets, thus mitigating potential risks associated with address reuse and the transition towards more secure cryptographic practices.