The error logging system in Google App Engine could be enhanced. While there are troubleshooting documents with Google-defined error logs, identifying the exact root cause can be challenging. Often, issues must be escalated through support to product engineering teams who access internal logs for resolution. Increasing the visibility of logging would help users identify issues more easily. Regarding runtimes, the validity period limitations can be problematic. When companies use legacy applications, migrating to new versions requires significant code changes and isn't always a simple lift-and-shift operation. Google App Engine should consider continuing to provide security patches for legacy applications, especially for customers with substantial billing. The manual scaling feature needs improvement, as it isn't available for all runtimes. Adding this capability across all runtimes would be beneficial for controlling instance scaling within specific parameters.
