Is GObject Introspection forgotten?

[Nikita Churaev <lamefun x0r gmail com>]

There are still problems like: can't specify if a property can be NULL
(eg. a NULL string), can't specify if an out parameter can return NULL,
no support for reference-counted structures, can't specify length
parameter for string arguments (eg. func (const char *test, int len))
--- with no apparent prospect of getting fixed. Is GObject Introspection
forgotten or are there some reasons why these problems are hard to fix
or can't be fixed?