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

[Per Nordlöw]

On Thursday, 22 November 2018 at 23:10:06 UTC, Per Nordlöw wrote:
> With emphasis on _incremental_ additions to the compiler for 
> covering more and more positives without introducing any 
> _false_ negatives whatsoever. Without loosing compilation 
> performance.

BTW, should such a compiler checking in D include pointers beside 
mandatory class checking?