GC and nullability issues are an unfortunate result of Unity using forked flavour of Mono runtime (that is significantly behind feature-wise and uses Boehm GC).

GC and nullability issues are an unfortunate result of Unity using forked flavour of Mono runtime (that is significantly behind feature-wise and uses Boehm GC). When Unity 6 comes out, all of these will hopefully become a thing of the past. The larger .NET ecosystem does not have much issues with GC performance nor with nulls since most new code written is with enabled nullable reference types so you pretty much always know if a reference is nullable or not.