Ok I'll bite: it doesn't matter.
This DIP is additive. The problem with D is not that we don't
have stuff in there, is most of the stuff in there are half
backed. Adding more half baked things in there only makes things
worse.
We don't have line number in stack traces, what does a better
assert error message (that one can configure by code) will do ?
Worse, how is that consistent with the position that "Segfault
are good enough with a debugger" and null by default reference
types ?
There is no point in discussing the doorbell when the house has
no window.