F2Pool co-founder Wang Chun wrote that Bitcoin protocol upgrades should not involve methods like the "bundling bills" used by American politicians to push through legislation. This is also the reason he rejected BIP-110 and BIP-54. He believes that the four issues the proposals attempt to address (including time deviation attacks, blocks with excessive verification time, forged payment proofs, and double spending) are only relatively minor edge cases in history, insufficient to justify the coordination costs, node upgrade workload, and community attention required for soft forks. Wang Chun emphasized that Bitcoin's known vulnerabilities are far more than these four, and limited development resources should be focused on more critical and impactful issues.