BlockBeats news, on April 5, Jan3 CEO Samson Mow posted a critique of Coinbase CEO Brian Armstrong for once again interfering in Bitcoin technical decisions.
Samson pointed out that the issues Brian Armstrong exposed during the block size war ten years ago remain unaddressed; he lacks humility and a deep understanding of the problems, instead setting opinions, action plans, and timelines before analyzing trade-offs. Coinbase’s own address reuse has made its wallet infrastructure vulnerable to quantum attacks, and it has frequently experienced outages during peak transaction periods. Samson advised Brian to “fix himself first.”
Samson believes that the threat from quantum computers does not currently exist and is not expected to emerge for another 10 to 20 years; therefore, there is no need to hastily switch from ECDSA/Schnorr to post-quantum signatures, and it is better to address the issue as late as possible to avoid greater risks.
Samson details three major drawbacks of a hasty quantum-resistant upgrade as follows: first, it may expose Bitcoin to current classical computer attacks; second, post-quantum signatures are 10 to 125 times larger, significantly reducing throughput and potentially triggering a "Block Size War 2.0"; third, it could serve as a Trojan horse, introducing RNG or cryptographic backdoors.