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1. Wastes storage capacity and costs: The same data is stored twice during the local retention window
2. Provides no immediate benefit: During the local retention period, reads prioritize local data, making the remote copy unnecessary

Example Scenario：Scenari and The goal:

Consider a topic with remote stroage enable:
- Local retention: 1 day (24 hours)
- Remote retention: 7 3 days (168 hours)72 hours)

Currently, data is stored in both tiers for the first 24 hours, resulting in about 16 hours of redundant storage (ignore the active segement gap). This can lead to cost increases.

So we can reduce the tiered storage redundancy for cost saving. In this case, it will save about 25% total size's cost.

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Currently, data is stored in both tiers for the first 24 hours, resulting in 24 hours of 
redundant storage. With typical data volumes, this can lead to significant cost increases.

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