Why does nobody seem to think that `null` is a serious problem in D?

[Per Nordlöw]

On Thursday, 22 November 2018 at 15:50:01 UTC, Stefan Koch wrote:
> I'd say the problem here is not just false positives, but false 
> negatives!

With emphasis on _incremental_ additions to the compiler for 
covering more and more positives without introducing any _false_ 
negatives whatsoever. Without loosing compilation performance.

I recall Walter saying this is challenging to get right but a 
very interesting task.

This would make D even more competitive against languages such as 
Rust.