At my work we migrated our codebase (a few hundred klines at the time, I think) with not too much effort. It helps that enabling the flag makes everything more

At my work we migrated our codebase (a few hundred klines at the time, I think) with not too much effort. It helps that enabling the flag makes everything more restrictive, so the compiler only flags the places that you need to go back and add the |null bits.