D compiler need -nogc witch and document of library also need nogc button

[KnightMare]

On Tuesday, 11 June 2019 at 14:44:20 UTC, KnightMare wrote:
Stroustrup said about C++ (not exactly quote. I translated it 
from my lang not English):
since C and C ++ will be used by the same people on
many years, the differences between languages should be
either minimal or maximal to minimize the amount
mistakes and misunderstandings.

so this 2 modes - gc & nogc - of D must follow the same principle.
DBC with RC will be new lang.
so, will they be very similar or very different?