Finalized no. 29

the Ethereum consensus-layer - Altair is here; the Merge is coming. tl;dr Altair upgrade epoch set, mainnet client releases in progress 👀 Merge interop spec released. Devnets to follow 🏺 Altair upgrade, Oct 27 Altair, the first mainnet upgrade to the Beacon Chain, has been scheduled for epoch 74240 (Oct 27, 2021, 10:56:23am UTC).......