[melling]

“Unannotated types are considered not-nullable”

Defaulting to not-nullable is a great idea. Much less boilerplate.

[erik_seaberg]

Rather than opting into a slightly incompatible dialect for some but not all code, I would like an IDE that lets me specify what is @Nullable, and quietly inserts @NotNull everywhere else without displaying it. We can keep the boilerplate in the bytecode without rubbing our noses in it.

[krzyk]

Depends on code base, at the beginning you would prefer the opposite, (not annotated are nullable).