Updated Cloud Drive Benefits (markdown)

Cloud-Drive-Benefits.md

@@ -36,15 +36,15 @@ However, how to make SeaweedFS work with data already on cloud?
   * Avoid noisy neighbors.
   * Minimum cost. Download data once.
 * Scalable Capacity
-  * Just pre-cache everything. No more delay on first uncached read.
-  * No need to try hard to find best caching strategy for different data access patterns.
+  * Just cache everything.
+  * No cache churn.
 * Easy To Manage
   * Warm up cache for by folder, file name pattern, file size, file age, etc.
   * Uncache by folder, file name pattern, file size, file age, etc.
   * Optionally write data back to cloud storage.
   * One system for both remote storage cache and local storage.
 * Flexible
-  * Can write data back to work with existing cloud ecosystems.
+  * Work with existing cloud ecosystems.
   * Can transparently switch to different cloud storage vendors.
   * Can detach from the cloud storage if decided to move off cloud.