There are a few ways 110 can activate. It’s looking like it will be user activated (nodes) Core will have to propose a user rejected fork or Bitcoin will have 2 chain tips forever battling until one chain forfeits. Core chain will have wipe out risk and knots chain won’t.

You're getting hard fork confused with a chain split. A hard fork is allowing what was not allowed before. Loosening the op return limit was a sneaky policy change & not a change to consensus rules. It was controlled by what transactions were allowed to propogate to the miners, not around what bloc...