The upgrade process involves a series of steps designed to ensure smooth transition and compatibility across different components of the system. Initially, the deployment of the dynamic commitment (dyn comm) feature is proposed as the first step. This is crucial for laying the groundwork for further modifications.

Following the initial deployment, the next step involves adjusting the max_accepted_htlcs parameter across all channels to align with the requirements set by v3 through the use of the newly deployed dyn comm feature. This adjustment is necessary to ensure that all channels comply with the new constraints imposed by v3, thereby facilitating a more seamless integration of the upgrade.

The final stage of the upgrade process includes updating all channel transactions to limit the V3 package size. This step is essential for maintaining consistency and ensuring that all channel transactions adhere to the specifications introduced by v3. Additionally, the upgrade addresses other technical specifications, such as the maximum number of anchor outputs and modifications to scriptpubkey types, which may affect the commitment size within the system. These changes highlight the technical intricacies involved in the upgrade process and underscore the importance of a methodical and phased deployment strategy to mitigate potential issues arising from these modifications.