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+Fee Estimation
+========================
+
+- The Bitcoin Core fee estimator minimum fee rate bucket was updated from **1 sat/vB** to **0.1 sat/vB**,
+  which matches the node’s default `minrelayfee`.
+  This means that for a given confirmation target, if a sub-1 sat/vB fee rate bucket is the minimum tracked
+  with sufficient data, its average value will be returned as the fee rate estimate.
+
+- Note: Restarting a node with this change invalidates previously saved estimates in `fee_estimates.dat`, the fee estimator will start tracking fresh stats.