The 18 September changelog records Transaction V1, a rent cut to 5,080 lamports per byte and a slot-time reduction to 250ms as notable mainnet feature gates, with SIMD debate on removing block compute limits.
The validator release adds vote-commission CLI commands and improves send-error stats in votor-transport — the plumbing behind the Alpenglow consensus change now landing in a mainnet-suitable build.
SIMD-0596 raises the account lock limit for version 1 transactions by half. It is a Draft, it does not touch legacy or v0 transactions, and the feature key is still blank.
Agave 4.3 is the release cycle that carries Votor, the replacement for Proof of History and TowerBFT. We opened SIMD-0326 itself: the thresholds check out, the headline latency figure is not in it, and the proposal is not accepted yet.
