While cache storage offers several benefits, it also poses some challenges:
1. Stale Content: Cached content may become outdated, displaying old images or styles even after updates have been made. 2. Testing and Analytics: Tracking the effectiveness of different elements can be difficult if they are loaded from cache, as it may not accurately reflect user interactions. 3. Compatibility: Not all email clients handle caching in the same way, leading to inconsistencies in how emails are displayed.