SCC Core v3.3.0 is a mandatory update for all services, MN and block producers.
Block 490,000 all old peers will be disconnected from v3.3.0 wallets. ProgPOW (Firopow in mining software) Mining Algorithm goes into effect at 1666350000 which is Friday, October 21, 2022 11:00:00 AM GMT.
Please note that while this release does it's best to be backwards-compatible, allowing for a smooth upgrade process; we do not recommend downgrading SCC Core and we do not provide support for such cases. This version makes consensus breaking changes that switching back will cause quite a few issues with your chain state. Links & Guides