There are different degrees of system compromise. Avalanche is resilient to a 51% attack. Check out https://tedyin.com/archive/snow-bft-demo/#/snow https://tedy

There are different degrees of system compromise. Avalanche is resilient to a 51% attack. Check out https://tedyin.com/archive/snow-bft-demo/#/snow https://tedyin.com/archive/snow-bft-demo/#/snow and the paper