Aligning privacy incentives in P2MR

The discussion regarding the choice between P2MR and P2TRv2 for Bitcoin users centers on the specific needs of individual users within the ecosystem. Users who are long-term holders with significant assets might favor P2MR, which permits continued control over their funds without exposing them to potential risks associated with Conditional Rebate Quantum Computing (CRQC). This is because P2MR only disables Emergency Consensus (EC) spending via a soft fork, allowing these users to maintain privacy and control by not exposing their EC public keys.

Conversely, users engaged in frequent transactions may find P2TRv2 more appealing despite its risks related to CRQC exposure until EC spending can be disabled. To mitigate this, proposals such as implementing Tripwire and Miner Lockdown triggers have been suggested. These triggers would enable the emergency disabling of EC spending while still allowing it to be subsequently turned off through a soft fork if necessary. This approach supports the needs of those who prefer transactional efficiency and trust in miner responsibility.

Furthermore, the integration of both address types—P2TRv2 and P2MR—into the system has been proposed, leveraging their respective advantages to cater to different user groups. The dual implementation strategy not only addresses diverse user preferences but also considers the increased complexity and maintenance costs that come with such a solution. This proposal reflects a balanced viewpoint, acknowledging the trade-offs between operational simplicity and user-specific requirements.