The Tezos mainnet has upgraded automatically, activating the ‘Jakarta’ proposal at block #2490369 
Thanks to all bakers and node runners for a successful 10th (!) upgrade. A quick overview of what’s included 
This #Tezos protocol upgrade introduces Transaction Optimistic Rollups 
It’s the first protocol native scaling solution on #Tezos and one of few truly decentralized Layer 2 solutions out there
Read all about them here:
Also in this #Tezos upgrade:
Extra security for Michelson tickets
Safer Sapling integration
New “Liquidity Baking Toggle Vote”
Improvements to the Michelson interpreter
No more rolls. Voting power now follows a delegate’s precise stake
As always, the upgrade train doesn’t stop here
We are currently finalizing the Kathmandu proposal – and further laying the groundwork for Smart Contract Optimistic Rollups, a Data Availability Layer, and other improvements to Tezos
