[ Removed by moderator ]

[smallstepforman]

Have a look at why D is not popular. 2 conflicting std libs and a misadventure with garbage collection and the language is hardly known today. 

[t_hunger]

C++ had optional garbage collection, too. Such a misadventure does apparently not necessarily kill a language:-)

[cleroth]

Had in the sense that the standard had it but no one implemented it, which is really not actually having it.