>The Committee voted to remove concepts from the version of the standard
>now being worked on because we estimated it would take at least 2 more
>years, and possibly 5, to complete the work and publish.
>
>With many other desirable features ready to go, and with the current
>standard already more than 10 years old, that seemed too long a delay.
>
>The choice was difficult, and nobody was happy about having to drop
>concepts, but the alternatives -- 5 years delay or standardizing an
>unusable version of concepts -- were far worse.

だって。