Why do you have to create a success option manually with Option<T>.flatmap?

[HIMISOCOOL]

for Option.flatMap the failure branch returns a None but the success branch only returns the function value

if (this._isEmpty) return None
else return f(this.value as A)

where as with Map

return this._isEmpty ? None : Some(f(this.value as A))

The result is boxed.
Is there a reason for this?

[sledorze]

@HIMISOCOOL f function taken as param of flatMap already does boxing.
That's standard FP behavior.
The result of both functions map and flatMap are an Option.